TextRenderer.MeasureText 方法

定義

在使用指定的字型繪製時,測量指定的文字。

多載

MeasureText(String, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(ReadOnlySpan<Char>, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(IDeviceContext, String, Font, Size)

使用指定之大小建立文字的初始周框,以指定之裝置內容中所指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font, Size)

使用指定之大小建立文字的初始周框,以指定之裝置內容中所指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(String, Font, Size)

使用指定的大小建立初始周框並以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font)

提供在指定的裝置內容中以指定的字型繪製之文字的大小 (以像素為單位)。

MeasureText(IDeviceContext, String, Font)

提供在指定的裝置內容中以指定的字型繪製之文字的大小 (以像素為單位)。

MeasureText(String, Font)

以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(ReadOnlySpan<Char>, Font)

以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的裝置內容、字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(ReadOnlySpan<Char>, Font, Size)

使用指定的大小建立初始周框並以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的裝置內容、字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

MeasureText(String, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::String ^ text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize, System::Windows::Forms::TextFormatFlags flags);
public static System.Drawing.Size MeasureText (string text, System.Drawing.Font font, System.Drawing.Size proposedSize, System.Windows.Forms.TextFormatFlags flags);
public static System.Drawing.Size MeasureText (string? text, System.Drawing.Font? font, System.Drawing.Size proposedSize, System.Windows.Forms.TextFormatFlags flags);
static member MeasureText : string * System.Drawing.Font * System.Drawing.Size * System.Windows.Forms.TextFormatFlags -> System.Drawing.Size
Public Shared Function MeasureText (text As String, font As Font, proposedSize As Size, flags As TextFormatFlags) As Size

參數

text
String

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

flags
TextFormatFlags

格式化指示,要套用至已測量的文字。

傳回

以指定之 text 和格式所繪製 fontSize (以像素為單位)。

範例

下列程式碼範例示範如何使用其中 MeasureText 一種方法。 若要執行此範例,請將程式碼貼到 Windows Form 中,並從表單的事件處理常式呼叫 DrawALineOfText ,並 e 傳遞為 PaintEventArgsPaint

private static void DrawALineOfText(PaintEventArgs e)
{
    // Declare strings to render on the form.
    string[] stringsToPaint = { "Tail", "Spin", " Toys" };

    // Declare fonts for rendering the strings.
    Font[] fonts = { new Font("Arial", 14, FontStyle.Regular), 
        new Font("Arial", 14, FontStyle.Italic), 
        new Font("Arial", 14, FontStyle.Regular) };

    Point startPoint = new Point(10, 10);

    // Set TextFormatFlags to no padding so strings are drawn together.
    TextFormatFlags flags = TextFormatFlags.NoPadding;

    // Declare a proposed size with dimensions set to the maximum integer value.
    Size proposedSize = new Size(int.MaxValue, int.MaxValue);

    // Measure each string with its font and NoPadding value and 
    // draw it to the form.
    for (int i = 0; i < stringsToPaint.Length; i++)
    {
        Size size = TextRenderer.MeasureText(e.Graphics, stringsToPaint[i], 
            fonts[i], proposedSize, flags);
        Rectangle rect = new Rectangle(startPoint, size);
        TextRenderer.DrawText(e.Graphics, stringsToPaint[i], fonts[i],
            startPoint, Color.Black, flags);
        startPoint.X += size.Width;
    }
}
Private Sub DrawALineOfText(ByVal e As PaintEventArgs)
    ' Declare strings to render on the form.
    Dim stringsToPaint() As String = {"Tail", "Spin", " Toys"}

    ' Declare fonts for rendering the strings.
    Dim fonts() As Font = {New Font("Arial", 14, FontStyle.Regular), _
        New Font("Arial", 14, FontStyle.Italic), _
        New Font("Arial", 14, FontStyle.Regular)}

    Dim startPoint As New Point(10, 10)

    ' Set TextFormatFlags to no padding so strings are drawn together.
    Dim flags As TextFormatFlags = TextFormatFlags.NoPadding

    ' Declare a proposed size with dimensions set to the maximum integer value.
    Dim proposedSize As Size = New Size(Integer.MaxValue, Integer.MaxValue)

    ' Measure each string with its font and NoPadding value and draw it to the form.
    For i As Integer = 0 To stringsToPaint.Length - 1
        Dim size As Size = TextRenderer.MeasureText(e.Graphics, _
            stringsToPaint(i), fonts(i), proposedSize, flags)
        Dim rect As Rectangle = New Rectangle(startPoint, size)
        TextRenderer.DrawText(e.Graphics, stringsToPaint(i), fonts(i), _
            startPoint, Color.Black, flags)
        startPoint.X += size.Width
    Next
End Sub

備註

MeasureTextproposedSize會使用 和 flags 參數來指出決定文字大小時高度與寬度的關聯性。 在單行上測量文字時,如果 proposedSize 參數代表 Size 高度維度大於 Int32.MaxValue 的 ,則會調整傳 Size 回的 ,以反映文字的實際高度。

您可以使用其中一個採用 DrawText 參數的 TextFormatFlags 多載,管理文字的繪製方式。 例如,TextRenderer 的預設行為是將邊框距離加入至已繪製之文字的週框 (Bounding Rectangle),以容納突出 (Overhanging) 的圖像 (Glyph)。 如果您需要繪製一行文字而不含這些額外空格,則應該使用會採用 DrawTextMeasureText 參數的 SizeTextFormatFlags 版本。 如需範例,請參閱 MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)

注意

這個 的多 MeasureText(String, Font, Size, TextFormatFlags) 載將會忽略 TextFormatFlagsLeftAndRightPadding 的值 NoPadding 。 如果您要指定預設值以外的填補值,您應該使用 接受 IDeviceContext 物件的 多載 MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)

適用於

MeasureText(ReadOnlySpan<Char>, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(ReadOnlySpan<char> text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize, System::Windows::Forms::TextFormatFlags flags);
public static System.Drawing.Size MeasureText (ReadOnlySpan<char> text, System.Drawing.Font? font, System.Drawing.Size proposedSize, System.Windows.Forms.TextFormatFlags flags);
static member MeasureText : ReadOnlySpan<char> * System.Drawing.Font * System.Drawing.Size * System.Windows.Forms.TextFormatFlags -> System.Drawing.Size
Public Shared Function MeasureText (text As ReadOnlySpan(Of Char), font As Font, proposedSize As Size, flags As TextFormatFlags) As Size

參數

text
ReadOnlySpan<Char>

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

flags
TextFormatFlags

格式化指示,要套用至已測量的文字。

傳回

以指定之 text 和格式所繪製 fontSize (以像素為單位)。

例外狀況

適用於

MeasureText(IDeviceContext, String, Font, Size)

使用指定之大小建立文字的初始周框,以指定之裝置內容中所指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::Drawing::IDeviceContext ^ dc, System::String ^ text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, string text, System.Drawing.Font font, System.Drawing.Size proposedSize);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, string? text, System.Drawing.Font? font, System.Drawing.Size proposedSize);
static member MeasureText : System.Drawing.IDeviceContext * string * System.Drawing.Font * System.Drawing.Size -> System.Drawing.Size
Public Shared Function MeasureText (dc As IDeviceContext, text As String, font As Font, proposedSize As Size) As Size

參數

dc
IDeviceContext

要在其中測量文字的裝置內容。

text
String

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

傳回

以指定之 text 所繪製 fontSize (以像素為單位)。

例外狀況

dcnull

範例

下列程式碼範例示範如何使用其中 MeasureText 一種方法。 若要執行此範例,請將程式碼貼到 Windows Form 中,並從表單的事件處理常式呼叫 DrawALineOfText ,並 e 傳遞為 PaintEventArgsPaint

private static void DrawALineOfText(PaintEventArgs e)
{
    // Declare strings to render on the form.
    string[] stringsToPaint = { "Tail", "Spin", " Toys" };

    // Declare fonts for rendering the strings.
    Font[] fonts = { new Font("Arial", 14, FontStyle.Regular), 
        new Font("Arial", 14, FontStyle.Italic), 
        new Font("Arial", 14, FontStyle.Regular) };

    Point startPoint = new Point(10, 10);

    // Set TextFormatFlags to no padding so strings are drawn together.
    TextFormatFlags flags = TextFormatFlags.NoPadding;

    // Declare a proposed size with dimensions set to the maximum integer value.
    Size proposedSize = new Size(int.MaxValue, int.MaxValue);

    // Measure each string with its font and NoPadding value and 
    // draw it to the form.
    for (int i = 0; i < stringsToPaint.Length; i++)
    {
        Size size = TextRenderer.MeasureText(e.Graphics, stringsToPaint[i], 
            fonts[i], proposedSize, flags);
        Rectangle rect = new Rectangle(startPoint, size);
        TextRenderer.DrawText(e.Graphics, stringsToPaint[i], fonts[i],
            startPoint, Color.Black, flags);
        startPoint.X += size.Width;
    }
}
Private Sub DrawALineOfText(ByVal e As PaintEventArgs)
    ' Declare strings to render on the form.
    Dim stringsToPaint() As String = {"Tail", "Spin", " Toys"}

    ' Declare fonts for rendering the strings.
    Dim fonts() As Font = {New Font("Arial", 14, FontStyle.Regular), _
        New Font("Arial", 14, FontStyle.Italic), _
        New Font("Arial", 14, FontStyle.Regular)}

    Dim startPoint As New Point(10, 10)

    ' Set TextFormatFlags to no padding so strings are drawn together.
    Dim flags As TextFormatFlags = TextFormatFlags.NoPadding

    ' Declare a proposed size with dimensions set to the maximum integer value.
    Dim proposedSize As Size = New Size(Integer.MaxValue, Integer.MaxValue)

    ' Measure each string with its font and NoPadding value and draw it to the form.
    For i As Integer = 0 To stringsToPaint.Length - 1
        Dim size As Size = TextRenderer.MeasureText(e.Graphics, _
            stringsToPaint(i), fonts(i), proposedSize, flags)
        Dim rect As Rectangle = New Rectangle(startPoint, size)
        TextRenderer.DrawText(e.Graphics, stringsToPaint(i), fonts(i), _
            startPoint, Color.Black, flags)
        startPoint.X += size.Width
    Next
End Sub

備註

方法 MeasureTextproposedSize 使用 參數來指出決定文字大小時高度與寬度的關聯性。 在單行上測量文字時,如果 proposedSize 參數代表 Size 高度維度大於 Int32.MaxValue 的 ,則會調整傳 Size 回的 ,以反映文字的實際高度。

適用於

MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font, Size)

使用指定之大小建立文字的初始周框,以指定之裝置內容中所指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::Drawing::IDeviceContext ^ dc, ReadOnlySpan<char> text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, ReadOnlySpan<char> text, System.Drawing.Font? font, System.Drawing.Size proposedSize);
static member MeasureText : System.Drawing.IDeviceContext * ReadOnlySpan<char> * System.Drawing.Font * System.Drawing.Size -> System.Drawing.Size
Public Shared Function MeasureText (dc As IDeviceContext, text As ReadOnlySpan(Of Char), font As Font, proposedSize As Size) As Size

參數

dc
IDeviceContext

要在其中測量文字的裝置內容。

text
ReadOnlySpan<Char>

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

傳回

以指定之 text 所繪製 fontSize (以像素為單位)。

例外狀況

dc 上所宣告的預設值是 null

適用於

MeasureText(String, Font, Size)

使用指定的大小建立初始周框並以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::String ^ text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize);
public static System.Drawing.Size MeasureText (string text, System.Drawing.Font font, System.Drawing.Size proposedSize);
public static System.Drawing.Size MeasureText (string? text, System.Drawing.Font? font, System.Drawing.Size proposedSize);
static member MeasureText : string * System.Drawing.Font * System.Drawing.Size -> System.Drawing.Size
Public Shared Function MeasureText (text As String, font As Font, proposedSize As Size) As Size

參數

text
String

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

傳回

以指定之 text 所繪製 fontSize (以像素為單位)。

範例

下列程式碼範例示範如何使用其中 MeasureText 一種方法。 若要執行此範例,請將程式碼貼到 Windows Form 中,並從表單的事件處理常式呼叫 DrawALineOfText ,並 e 傳遞為 PaintEventArgsPaint

private static void DrawALineOfText(PaintEventArgs e)
{
    // Declare strings to render on the form.
    string[] stringsToPaint = { "Tail", "Spin", " Toys" };

    // Declare fonts for rendering the strings.
    Font[] fonts = { new Font("Arial", 14, FontStyle.Regular), 
        new Font("Arial", 14, FontStyle.Italic), 
        new Font("Arial", 14, FontStyle.Regular) };

    Point startPoint = new Point(10, 10);

    // Set TextFormatFlags to no padding so strings are drawn together.
    TextFormatFlags flags = TextFormatFlags.NoPadding;

    // Declare a proposed size with dimensions set to the maximum integer value.
    Size proposedSize = new Size(int.MaxValue, int.MaxValue);

    // Measure each string with its font and NoPadding value and 
    // draw it to the form.
    for (int i = 0; i < stringsToPaint.Length; i++)
    {
        Size size = TextRenderer.MeasureText(e.Graphics, stringsToPaint[i], 
            fonts[i], proposedSize, flags);
        Rectangle rect = new Rectangle(startPoint, size);
        TextRenderer.DrawText(e.Graphics, stringsToPaint[i], fonts[i],
            startPoint, Color.Black, flags);
        startPoint.X += size.Width;
    }
}
Private Sub DrawALineOfText(ByVal e As PaintEventArgs)
    ' Declare strings to render on the form.
    Dim stringsToPaint() As String = {"Tail", "Spin", " Toys"}

    ' Declare fonts for rendering the strings.
    Dim fonts() As Font = {New Font("Arial", 14, FontStyle.Regular), _
        New Font("Arial", 14, FontStyle.Italic), _
        New Font("Arial", 14, FontStyle.Regular)}

    Dim startPoint As New Point(10, 10)

    ' Set TextFormatFlags to no padding so strings are drawn together.
    Dim flags As TextFormatFlags = TextFormatFlags.NoPadding

    ' Declare a proposed size with dimensions set to the maximum integer value.
    Dim proposedSize As Size = New Size(Integer.MaxValue, Integer.MaxValue)

    ' Measure each string with its font and NoPadding value and draw it to the form.
    For i As Integer = 0 To stringsToPaint.Length - 1
        Dim size As Size = TextRenderer.MeasureText(e.Graphics, _
            stringsToPaint(i), fonts(i), proposedSize, flags)
        Dim rect As Rectangle = New Rectangle(startPoint, size)
        TextRenderer.DrawText(e.Graphics, stringsToPaint(i), fonts(i), _
            startPoint, Color.Black, flags)
        startPoint.X += size.Width
    Next
End Sub

備註

方法 MeasureTextproposedSize 使用 參數來指出決定文字大小時高度與寬度的關聯性。 在單行上測量文字時,如果 proposedSize 參數代表 Size 高度維度大於 Int32.MaxValue 的 ,則會調整傳 Size 回的 ,以反映文字的實際高度。

適用於

MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font)

提供在指定的裝置內容中以指定的字型繪製之文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::Drawing::IDeviceContext ^ dc, ReadOnlySpan<char> text, System::Drawing::Font ^ font);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, ReadOnlySpan<char> text, System.Drawing.Font? font);
static member MeasureText : System.Drawing.IDeviceContext * ReadOnlySpan<char> * System.Drawing.Font -> System.Drawing.Size
Public Shared Function MeasureText (dc As IDeviceContext, text As ReadOnlySpan(Of Char), font As Font) As Size

參數

dc
IDeviceContext

要在其中測量文字的裝置內容。

text
ReadOnlySpan<Char>

要測量的文字。

font
Font

Font,要套用到已測量的文字。

傳回

以指定之裝置內容中所指定的 font 所繪製之 textSize (以像素為單位)。

例外狀況

dc 上所宣告的預設值是 null

適用於

MeasureText(IDeviceContext, String, Font)

提供在指定的裝置內容中以指定的字型繪製之文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::Drawing::IDeviceContext ^ dc, System::String ^ text, System::Drawing::Font ^ font);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, string text, System.Drawing.Font font);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, string? text, System.Drawing.Font? font);
static member MeasureText : System.Drawing.IDeviceContext * string * System.Drawing.Font -> System.Drawing.Size
Public Shared Function MeasureText (dc As IDeviceContext, text As String, font As Font) As Size

參數

dc
IDeviceContext

要在其中測量文字的裝置內容。

text
String

要測量的文字。

font
Font

Font,要套用到已測量的文字。

傳回

以指定之裝置內容中所指定的 text,在單行上所繪製 fontSize (以像素為單位)。

範例

下列程式碼範例示範如何使用其中 MeasureText 一種方法。 若要執行此範例,請將程式碼貼到 Windows Form 中,並從表單的事件處理常式呼叫 DrawALineOfText ,並 e 傳遞為 PaintEventArgsPaint

private static void DrawALineOfText(PaintEventArgs e)
{
    // Declare strings to render on the form.
    string[] stringsToPaint = { "Tail", "Spin", " Toys" };

    // Declare fonts for rendering the strings.
    Font[] fonts = { new Font("Arial", 14, FontStyle.Regular), 
        new Font("Arial", 14, FontStyle.Italic), 
        new Font("Arial", 14, FontStyle.Regular) };

    Point startPoint = new Point(10, 10);

    // Set TextFormatFlags to no padding so strings are drawn together.
    TextFormatFlags flags = TextFormatFlags.NoPadding;

    // Declare a proposed size with dimensions set to the maximum integer value.
    Size proposedSize = new Size(int.MaxValue, int.MaxValue);

    // Measure each string with its font and NoPadding value and 
    // draw it to the form.
    for (int i = 0; i < stringsToPaint.Length; i++)
    {
        Size size = TextRenderer.MeasureText(e.Graphics, stringsToPaint[i], 
            fonts[i], proposedSize, flags);
        Rectangle rect = new Rectangle(startPoint, size);
        TextRenderer.DrawText(e.Graphics, stringsToPaint[i], fonts[i],
            startPoint, Color.Black, flags);
        startPoint.X += size.Width;
    }
}
Private Sub DrawALineOfText(ByVal e As PaintEventArgs)
    ' Declare strings to render on the form.
    Dim stringsToPaint() As String = {"Tail", "Spin", " Toys"}

    ' Declare fonts for rendering the strings.
    Dim fonts() As Font = {New Font("Arial", 14, FontStyle.Regular), _
        New Font("Arial", 14, FontStyle.Italic), _
        New Font("Arial", 14, FontStyle.Regular)}

    Dim startPoint As New Point(10, 10)

    ' Set TextFormatFlags to no padding so strings are drawn together.
    Dim flags As TextFormatFlags = TextFormatFlags.NoPadding

    ' Declare a proposed size with dimensions set to the maximum integer value.
    Dim proposedSize As Size = New Size(Integer.MaxValue, Integer.MaxValue)

    ' Measure each string with its font and NoPadding value and draw it to the form.
    For i As Integer = 0 To stringsToPaint.Length - 1
        Dim size As Size = TextRenderer.MeasureText(e.Graphics, _
            stringsToPaint(i), fonts(i), proposedSize, flags)
        Dim rect As Rectangle = New Rectangle(startPoint, size)
        TextRenderer.DrawText(e.Graphics, stringsToPaint(i), fonts(i), _
            startPoint, Color.Black, flags)
        startPoint.X += size.Width
    Next
End Sub

備註

方法 MeasureText 需要以單行繪製文字。

適用於

MeasureText(String, Font)

以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::String ^ text, System::Drawing::Font ^ font);
public static System.Drawing.Size MeasureText (string text, System.Drawing.Font font);
public static System.Drawing.Size MeasureText (string? text, System.Drawing.Font? font);
static member MeasureText : string * System.Drawing.Font -> System.Drawing.Size
Public Shared Function MeasureText (text As String, font As Font) As Size

參數

text
String

要測量的文字。

font
Font

Font,要套用到已測量的文字。

傳回

以指定之 text,在單行上已繪製之 fontSize (以像素為單位)。 您可以使用其中一個採用 DrawText(IDeviceContext, String, Font, Rectangle, Color, TextFormatFlags) 參數的 TextFormatFlags 多載,管理文字的繪製方式。 例如,TextRenderer 的預設行為是將邊框距離加入至已繪製之文字的週框 (Bounding Rectangle),以容納突出 (Overhanging) 的圖像 (Glyph)。 如果您需要繪製一行文字而不含這些額外空格,則應該使用會採用 DrawText(IDeviceContext, String, Font, Point, Color)MeasureText(IDeviceContext, String, Font) 參數的 SizeTextFormatFlags 版本。 如需範例,請參閱 MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)

範例

下列程式碼範例會示範如何使用 MeasureText 方法。 若要執行此範例,請將程式碼貼到 Windows Form 中,並從表單的事件處理常式呼叫 MeasureText1 ,並 e 傳遞為 PaintEventArgsPaint

private void MeasureText1(PaintEventArgs e)
{
    String text1 = "Measure this text";
    Font arialBold = new Font("Arial", 12.0F);
    Size textSize = TextRenderer.MeasureText(text1, arialBold);
    TextRenderer.DrawText(e.Graphics, text1, arialBold, 
        new Rectangle(new Point(10, 10), textSize), Color.Red);  
}
Private Sub MeasureText1(ByVal e As PaintEventArgs)
    Dim text1 As String = "Measure this text"
    Dim arialBold As New Font("Arial", 12.0F)
    Dim textSize As Size = TextRenderer.MeasureText(text1, arialBold)
    TextRenderer.DrawText(e.Graphics, text1, arialBold, _
        New Rectangle(New Point(10, 10), textSize), Color.Red)

End Sub

備註

方法 MeasureText 需要以單行繪製文字。

適用於

MeasureText(ReadOnlySpan<Char>, Font)

以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(ReadOnlySpan<char> text, System::Drawing::Font ^ font);
public static System.Drawing.Size MeasureText (ReadOnlySpan<char> text, System.Drawing.Font? font);
static member MeasureText : ReadOnlySpan<char> * System.Drawing.Font -> System.Drawing.Size
Public Shared Function MeasureText (text As ReadOnlySpan(Of Char), font As Font) As Size

參數

text
ReadOnlySpan<Char>

要測量的文字。

font
Font

Font,要套用到已測量的文字。

傳回

使用指定的字型在單行上繪製之文字的 Size (以像素為單位)。 您可以使用其中一個採用 DrawText(IDeviceContext, ReadOnlySpan<Char>, Font, Rectangle, Color, TextFormatFlags) 參數的 TextFormatFlags 多載,管理文字的繪製方式。 例如,TextRenderer 的預設行為是將邊框距離加入至已繪製之文字的週框 (Bounding Rectangle),以容納突出 (Overhanging) 的圖像 (Glyph)。 如果您需要繪製一行文字而不含這些額外空格,則應該使用會接受 Size 與 TextFormatFlags 參數的 DrawText(IDeviceContext, ReadOnlySpan<Char>, Font, Point, Color)MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font) 版本。 如需範例,請參閱 MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)

適用於

MeasureText(IDeviceContext, ReadOnlySpan<Char>, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的裝置內容、字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::Drawing::IDeviceContext ^ dc, ReadOnlySpan<char> text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize, System::Windows::Forms::TextFormatFlags flags);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, ReadOnlySpan<char> text, System.Drawing.Font? font, System.Drawing.Size proposedSize, System.Windows.Forms.TextFormatFlags flags);
static member MeasureText : System.Drawing.IDeviceContext * ReadOnlySpan<char> * System.Drawing.Font * System.Drawing.Size * System.Windows.Forms.TextFormatFlags -> System.Drawing.Size
Public Shared Function MeasureText (dc As IDeviceContext, text As ReadOnlySpan(Of Char), font As Font, proposedSize As Size, flags As TextFormatFlags) As Size

參數

dc
IDeviceContext

要在其中測量文字的裝置內容。

text
ReadOnlySpan<Char>

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

flags
TextFormatFlags

格式化指示,要套用至已測量的文字。

傳回

以指定之 text 和格式所繪製 fontSize (以像素為單位)。

例外狀況

dcnull

適用於

MeasureText(ReadOnlySpan<Char>, Font, Size)

使用指定的大小建立初始周框並以指定的字型繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(ReadOnlySpan<char> text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize);
public static System.Drawing.Size MeasureText (ReadOnlySpan<char> text, System.Drawing.Font? font, System.Drawing.Size proposedSize);
static member MeasureText : ReadOnlySpan<char> * System.Drawing.Font * System.Drawing.Size -> System.Drawing.Size
Public Shared Function MeasureText (text As ReadOnlySpan(Of Char), font As Font, proposedSize As Size) As Size

參數

text
ReadOnlySpan<Char>

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

傳回

以指定之 text 所繪製 fontSize (以像素為單位)。

適用於

MeasureText(IDeviceContext, String, Font, Size, TextFormatFlags)

使用指定的大小建立文字的初始周框 ,以指定的裝置內容、字型和格式化指示繪製時,提供所指定文字的大小 (以像素為單位)。

public:
 static System::Drawing::Size MeasureText(System::Drawing::IDeviceContext ^ dc, System::String ^ text, System::Drawing::Font ^ font, System::Drawing::Size proposedSize, System::Windows::Forms::TextFormatFlags flags);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, string text, System.Drawing.Font font, System.Drawing.Size proposedSize, System.Windows.Forms.TextFormatFlags flags);
public static System.Drawing.Size MeasureText (System.Drawing.IDeviceContext dc, string? text, System.Drawing.Font? font, System.Drawing.Size proposedSize, System.Windows.Forms.TextFormatFlags flags);
static member MeasureText : System.Drawing.IDeviceContext * string * System.Drawing.Font * System.Drawing.Size * System.Windows.Forms.TextFormatFlags -> System.Drawing.Size
Public Shared Function MeasureText (dc As IDeviceContext, text As String, font As Font, proposedSize As Size, flags As TextFormatFlags) As Size

參數

dc
IDeviceContext

要在其中測量文字的裝置內容。

text
String

要測量的文字。

font
Font

Font,要套用到已測量的文字。

proposedSize
Size

初始周框 (Bounding Rectangle) 的 Size

flags
TextFormatFlags

格式化指示,要套用至已測量的文字。

傳回

以指定之 text 和格式所繪製 fontSize (以像素為單位)。

例外狀況

dcnull

範例

下列範例示範如何使用 MeasureTextDrawText 方法,在不同的字型樣式中繪製單行文字。 若要執行此範例,請將下列程式碼貼到 Windows Form 中,並從表單的事件處理常式呼叫 DrawALineOfText ,並 e 傳遞為 PaintEventArgsPaint

private static void DrawALineOfText(PaintEventArgs e)
{
    // Declare strings to render on the form.
    string[] stringsToPaint = { "Tail", "Spin", " Toys" };

    // Declare fonts for rendering the strings.
    Font[] fonts = { new Font("Arial", 14, FontStyle.Regular), 
        new Font("Arial", 14, FontStyle.Italic), 
        new Font("Arial", 14, FontStyle.Regular) };

    Point startPoint = new Point(10, 10);

    // Set TextFormatFlags to no padding so strings are drawn together.
    TextFormatFlags flags = TextFormatFlags.NoPadding;

    // Declare a proposed size with dimensions set to the maximum integer value.
    Size proposedSize = new Size(int.MaxValue, int.MaxValue);

    // Measure each string with its font and NoPadding value and 
    // draw it to the form.
    for (int i = 0; i < stringsToPaint.Length; i++)
    {
        Size size = TextRenderer.MeasureText(e.Graphics, stringsToPaint[i], 
            fonts[i], proposedSize, flags);
        Rectangle rect = new Rectangle(startPoint, size);
        TextRenderer.DrawText(e.Graphics, stringsToPaint[i], fonts[i],
            startPoint, Color.Black, flags);
        startPoint.X += size.Width;
    }
}
Private Sub DrawALineOfText(ByVal e As PaintEventArgs)
    ' Declare strings to render on the form.
    Dim stringsToPaint() As String = {"Tail", "Spin", " Toys"}

    ' Declare fonts for rendering the strings.
    Dim fonts() As Font = {New Font("Arial", 14, FontStyle.Regular), _
        New Font("Arial", 14, FontStyle.Italic), _
        New Font("Arial", 14, FontStyle.Regular)}

    Dim startPoint As New Point(10, 10)

    ' Set TextFormatFlags to no padding so strings are drawn together.
    Dim flags As TextFormatFlags = TextFormatFlags.NoPadding

    ' Declare a proposed size with dimensions set to the maximum integer value.
    Dim proposedSize As Size = New Size(Integer.MaxValue, Integer.MaxValue)

    ' Measure each string with its font and NoPadding value and draw it to the form.
    For i As Integer = 0 To stringsToPaint.Length - 1
        Dim size As Size = TextRenderer.MeasureText(e.Graphics, _
            stringsToPaint(i), fonts(i), proposedSize, flags)
        Dim rect As Rectangle = New Rectangle(startPoint, size)
        TextRenderer.DrawText(e.Graphics, stringsToPaint(i), fonts(i), _
            startPoint, Color.Black, flags)
        startPoint.X += size.Width
    Next
End Sub

備註

方法 MeasureText 會使用 proposedSizeflags 參數來指出決定文字大小時高度與寬度的關聯性。 在單行上測量文字時,如果 proposedSize 參數代表 Size 高度維度大於 Int32.MaxValue 的 ,則會調整傳 Size 回的 ,以反映文字的實際高度。

您可以使用其中一個採用 DrawText 參數的 TextFormatFlags 多載,管理文字的繪製方式。 例如,TextRenderer 的預設行為是將邊框距離加入至已繪製之文字的週框 (Bounding Rectangle),以容納突出 (Overhanging) 的圖像 (Glyph)。 如果您需要繪製不含這些額外空格的文字行,請使用 採用 和 TextFormatFlags 參數的 DrawTextMeasureTextSize 版本,如範例所示。

適用於