ComboBoxRenderer.DrawTextBox 方法

参考

定义

命名空间:: System.Windows.Forms

程序集:: System.Windows.Forms.dll

重要

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使用操作系统当前视觉样式绘制一个文本框。

重载

DrawTextBox(Graphics, Rectangle, ComboBoxState)	在指定边界内绘制指定状态的文本框。
DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState)	使用指定文本在指定边界内绘制指定状态的文本框。
DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, ComboBoxState)	使用指定的文本和文本边界在指定边界内绘制指定状态的文本框。
DrawTextBox(Graphics, Rectangle, String, Font, TextFormatFlags, ComboBoxState)	使用指定的文本和文本格式在指定边界内绘制指定状态的文本框。
DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, TextFormatFlags, ComboBoxState)	使用指定的文本、文本格式和文本边界在指定边界内绘制指定状态的文本框。

DrawTextBox(Graphics, Rectangle, ComboBoxState)

在指定边界内绘制指定状态的文本框。

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, state As ComboBoxState)

参数

g: Graphics

用于绘制文本框的 Graphics。

bounds: Rectangle

指定文本框边界的 Rectangle。

state: ComboBoxState

ComboBoxState 值之一，它指定文本框的可视状态。

例外

InvalidOperationException

操作系统不支持视觉样式。

或 -

用户在操作系统中禁用视觉样式。

或 -

视觉样式不应用于应用程序窗口的工作区。

注解

在调用此方法之前，应验证 IsSupported 属性是否 true返回。

适用于

DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState)

使用指定文本在指定边界内绘制指定状态的文本框。

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, state As ComboBoxState)

参数

g: Graphics

用于绘制文本框的 Graphics。

bounds: Rectangle

指定文本框边界的 Rectangle。

comboBoxText: String

要在文本框中绘制的 String。

font: Font

要应用于 comboBoxText 的 Font。

state: ComboBoxState

ComboBoxState 值之一，它指定文本框的可视状态。

例外

InvalidOperationException

操作系统不支持视觉样式。

或 -

用户在操作系统中禁用视觉样式。

或 -

视觉样式不应用于应用程序窗口的工作区。

注解

在调用此方法之前，应验证 IsSupported 属性是否 true返回。

适用于

DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, ComboBoxState)

使用指定的文本和文本边界在指定边界内绘制指定状态的文本框。

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Drawing::Rectangle textBounds, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Drawing.Rectangle textBounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Drawing.Rectangle textBounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Drawing.Rectangle * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, textBounds As Rectangle, state As ComboBoxState)

参数

g: Graphics

用于绘制文本框的 Graphics。

bounds: Rectangle

指定文本框边界的 Rectangle。

comboBoxText: String

要在文本框中绘制的 String。

font: Font

要应用于 comboBoxText 的 Font。

textBounds: Rectangle

Rectangle，指定 comboBoxText 的绘制边界。

state: ComboBoxState

ComboBoxState 值之一，它指定文本框的可视状态。

例外

InvalidOperationException

操作系统不支持视觉样式。

或 -

用户在操作系统中禁用视觉样式。

或 -

视觉样式不应用于应用程序窗口的工作区。

示例

下面的代码示例使用 DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState) 自定义控件 OnPaint 方法中的方法绘制文本框。此代码示例是为类提供的大型示例的 ComboBoxRenderer 一部分。

      // Draw the combo box in the current state.
protected:
    virtual void OnPaint(PaintEventArgs^ e) override 
    {
        Control::OnPaint(e);

        if (!ComboBoxRenderer::IsSupported)
        {
            this->Parent->Text = "Visual Styles Disabled";
            return;
        }

        this->Parent->Text = "CustomComboBox Enabled";

        // Always draw the main text box and drop down arrow in their
        // current states
        ComboBoxRenderer::DrawTextBox(e->Graphics, topTextBoxRectangle,
            this->Text, this->Font, textBoxState);
        ComboBoxRenderer::DrawDropDownButton(e->Graphics, arrowRectangle,
            arrowState);

        // Only draw the bottom text box if the arrow has been clicked
        if (isActivated)
        {
            ComboBoxRenderer::DrawTextBox(e->Graphics,
                bottomTextBoxRectangle, bottomText, this->Font,
                textBoxState);
        }
    }

protected:
    virtual void OnMouseDown(MouseEventArgs^ e) override 
    {
        Control::OnMouseDown(e);

        // Check whether the user clicked the arrow.
        if (arrowRectangle.Contains(e->Location) &&
            ComboBoxRenderer::IsSupported)
        {
            // Draw the arrow in the pressed state.
            arrowState = ComboBoxState::Pressed;

            // The user has activated the combo box.
            if (!isActivated)
            {
                this->Text = "Clicked!";
                textBoxState = ComboBoxState::Pressed;
                isActivated = true;
            }

            // The user has deactivated the combo box.
            else
            {
                this->Text = "Click here";
                textBoxState = ComboBoxState::Normal;
                isActivated = false;
            }

            // Redraw the control.
            Invalidate();
        }
    }

// Draw the combo box in the current state.
protected override void OnPaint(PaintEventArgs e)
{
    base.OnPaint(e);

    if (!ComboBoxRenderer.IsSupported)
    {
        this.Parent.Text = "Visual Styles Disabled";
        return;
    }

    this.Parent.Text = "CustomComboBox Enabled";

    // Always draw the main text box and drop down arrow in their 
    // current states
    ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle,
        this.Text, this.Font, textBoxState);
    ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle,
        arrowState);

    // Only draw the bottom text box if the arrow has been clicked
    if (isActivated)
    {
        ComboBoxRenderer.DrawTextBox(e.Graphics,
            bottomTextBoxRectangle, bottomText, this.Font,
            textBoxState);
    }
}

protected override void OnMouseDown(MouseEventArgs e)
{
    base.OnMouseDown(e);

    // Check whether the user clicked the arrow.
    if (arrowRectangle.Contains(e.Location) &&
        ComboBoxRenderer.IsSupported)
    {
        // Draw the arrow in the pressed state.
        arrowState = ComboBoxState.Pressed;

        // The user has activated the combo box.
        if (!isActivated)
        {
            this.Text = "Clicked!";
            textBoxState = ComboBoxState.Pressed;
            isActivated = true;
        }

        // The user has deactivated the combo box.
        else
        {
            this.Text = "Click here";
            textBoxState = ComboBoxState.Normal;
            isActivated = false;
        }

        // Redraw the control.
        Invalidate();
    }
}

' Draw the combo box in the current state.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
    MyBase.OnPaint(e)

    If Not ComboBoxRenderer.IsSupported Then
        Me.Parent.Text = "Visual Styles	Disabled"
        Return
    End If

    Me.Parent.Text = "CustomComboBox Enabled"

    ' Always draw the main text box and drop down arrow in their 
    ' current states.
    ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle, _
        Me.Text, Me.Font, textBoxState)
    ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle, _
        arrowState)

    ' Only draw the bottom text box if the arrow has been clicked.
    If isActivated Then
        ComboBoxRenderer.DrawTextBox(e.Graphics, _
            bottomTextBoxRectangle, bottomText, Me.Font, textBoxState)
    End If
End Sub

Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
    MyBase.OnMouseDown(e)

    ' Check whether the user clicked the arrow.
    If arrowRectangle.Contains(e.Location) And _
        ComboBoxRenderer.IsSupported Then

        ' Draw the arrow in the pressed state.
        arrowState = ComboBoxState.Pressed

        ' The user has activated the combo box.
        If Not isActivated Then
            Me.Text = "Clicked!"
            textBoxState = ComboBoxState.Pressed
            isActivated = True

        ' The user has deactivated the combo box.
        Else
            Me.Text = "Click here"
            textBoxState = ComboBoxState.Normal
            isActivated = False
        End If

        ' Redraw the control.
        Invalidate()
    End If
End Sub

注解

在调用此方法之前，应验证 IsSupported 属性是否 true返回。

适用于

DrawTextBox(Graphics, Rectangle, String, Font, TextFormatFlags, ComboBoxState)

使用指定的文本和文本格式在指定边界内绘制指定状态的文本框。

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Windows::Forms::TextFormatFlags flags, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Windows.Forms.TextFormatFlags * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, flags As TextFormatFlags, state As ComboBoxState)

参数

g: Graphics

用于绘制文本框的 Graphics。

bounds: Rectangle

指定文本框边界的 Rectangle。

comboBoxText: String

要在文本框中绘制的 String。

font: Font

要应用于 comboBoxText 的 Font。

flags: TextFormatFlags

TextFormatFlags 值的按位组合。

state: ComboBoxState

ComboBoxState 值之一，它指定文本框的可视状态。

例外

InvalidOperationException

操作系统不支持视觉样式。

或 -

用户在操作系统中禁用视觉样式。

或 -

视觉样式不应用于应用程序窗口的工作区。

注解

在调用此方法之前，应验证 IsSupported 属性是否 true返回。

适用于

DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, TextFormatFlags, ComboBoxState)

使用指定的文本、文本格式和文本边界在指定边界内绘制指定状态的文本框。

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Drawing::Rectangle textBounds, System::Windows::Forms::TextFormatFlags flags, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string comboBoxText, System.Drawing.Font font, System.Drawing.Rectangle textBounds, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Drawing.Rectangle textBounds, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Drawing.Rectangle * System.Windows.Forms.TextFormatFlags * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, textBounds As Rectangle, flags As TextFormatFlags, state As ComboBoxState)

参数

g: Graphics

用于绘制文本框的 Graphics。

bounds: Rectangle

指定文本框边界的 Rectangle。

comboBoxText: String

要在文本框中绘制的 String。

font: Font

要应用于 comboBoxText 的 Font。

textBounds: Rectangle

Rectangle，指定 comboBoxText 的绘制边界。

flags: TextFormatFlags

TextFormatFlags 值的按位组合。

state: ComboBoxState

ComboBoxState 值之一，它指定文本框的可视状态。

例外

InvalidOperationException

操作系统不支持视觉样式。

或 -

用户在操作系统中禁用视觉样式。

或 -

视觉样式不应用于应用程序窗口的工作区。

注解

在调用此方法之前，应验证 IsSupported 属性是否 true返回。

适用于

通过

ComboBoxRenderer.DrawTextBox 方法

定义

重载

DrawTextBox(Graphics, Rectangle, ComboBoxState)

参数

例外

注解

适用于

DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState)

参数

例外

注解

适用于

DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, ComboBoxState)

参数

例外

示例

注解

适用于

DrawTextBox(Graphics, Rectangle, String, Font, TextFormatFlags, ComboBoxState)

参数

例外

注解

适用于

DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, TextFormatFlags, ComboBoxState)

参数

例外

注解

适用于

其他资源