GridViewDesigner.GetDesignTimeHtml 方法

參考

定義

命名空間:: System.Web.UI.Design.WebControls

組件:: System.Design.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

取得在設計階段用來呈現相關聯 GridView 控制項的標記。

多載

GetDesignTimeHtml()	取得在設計階段用來呈現關聯控制項的標記。
GetDesignTimeHtml(DesignerRegionCollection)	取得標記，此標記可用來在設計階段呈現關聯控制項，並填入設計工具區域的集合中。

GetDesignTimeHtml()

取得在設計階段用來呈現關聯控制項的標記。

public:
 override System::String ^ GetDesignTimeHtml();

public override string GetDesignTimeHtml ();

override this.GetDesignTimeHtml : unit -> string

Public Overrides Function GetDesignTimeHtml () As String

傳回

String

String，包含在設計階段用來呈現 GridView 的標記。

範例

下列程式碼範例示範如何在設計階段覆寫 GetDesignTimeHtml 繼承自類別的 GridViewDesigner 類別中的方法，以變更控制項的外觀 GridView 。如果已定義， Caption 此範例會將新的第一個資料列加入方格，以包含 Caption 屬性。 BorderStyle如果衍生自 GridView 類別之控制項的屬性具有 NotSet 或 None 值，則會 GetDesignTimeHtml 在控制項周圍繪製藍色虛線框線，使其範圍更可見。它不會變更控制項的執行時間外觀。

// Generate the design-time markup.
const string capTag = "caption";
const string trOpen = "tr><td colspan=9 align=center";
const string trClose = "td></tr";

public override string GetDesignTimeHtml()
{
    // Make the full extent of the control more visible in the designer.
    // If the border style is None or NotSet, change the border to
    // a wide, blue, dashed line. Include the caption within the border.
    MyGridView myGV = (MyGridView)Component;
    string markup = null;
    int charX;

    // Check if the border style should be changed.
    if (myGV.BorderStyle == BorderStyle.NotSet ||
        myGV.BorderStyle == BorderStyle.None)
    {
        BorderStyle oldBorderStyle = myGV.BorderStyle;
        Unit oldBorderWidth = myGV.BorderWidth;
        Color oldBorderColor = myGV.BorderColor;

        // Set the design-time properties and catch any exceptions.
        try
        {
            myGV.BorderStyle = BorderStyle.Dashed;
            myGV.BorderWidth = Unit.Pixel(3);
            myGV.BorderColor = Color.Blue;

            // Call the base method to generate the markup.
            markup = base.GetDesignTimeHtml();
        }
        catch (Exception ex)
        {
            markup = GetErrorDesignTimeHtml(ex);
        }
        finally
        {
            // Restore the properties to their original settings.
            myGV.BorderStyle = oldBorderStyle;
            myGV.BorderWidth = oldBorderWidth;
            myGV.BorderColor = oldBorderColor;
        }
    }
    else
    {
        // Call the base method to generate the markup.
        markup = base.GetDesignTimeHtml();
    }

    // Look for a <caption> tag.
    if ((charX = markup.IndexOf(capTag)) > 0)
    {
        // Replace the first caption with 
        // "tr><td colspan=9 align=center".
        // It is okay if the colspan exceeds the 
        // number of columns in the table.
        markup = markup.Remove(charX,
            capTag.Length).Insert(charX, trOpen);

        // Replace the second caption with "td></tr".
        if ((charX = markup.IndexOf(capTag, charX)) > 0)
            markup = markup.Remove(charX,
                capTag.Length).Insert(charX, trClose);
    }
    return markup;
} // GetDesignTimeHtml

' Generate the design-time markup.
Private Const capTag As String = "caption"
Private Const trOpen As String = "tr><td colspan=9 align=center"
Private Const trClose As String = "td></tr"

Public Overrides Function GetDesignTimeHtml() As String

    ' Make the full extent of the control more visible in the designer.
    ' If the border style is None or NotSet, change the border to
    ' a wide, blue, dashed line. Include the caption within the border.
    Dim myGV As MyGridView = CType(Component, MyGridView)
    Dim markup As String = Nothing
    Dim charX As Integer

    ' Check if the border style should be changed.
    If (myGV.BorderStyle = BorderStyle.NotSet Or _
        myGV.BorderStyle = BorderStyle.None) Then

        Dim oldBorderStyle As BorderStyle = myGV.BorderStyle
        Dim oldBorderWidth As Unit = myGV.BorderWidth
        Dim oldBorderColor As Color = myGV.BorderColor

        ' Set the design-time properties and catch any exceptions.
        Try
            myGV.BorderStyle = BorderStyle.Dashed
            myGV.BorderWidth = Unit.Pixel(3)
            myGV.BorderColor = Color.Blue

            ' Call the base method to generate the markup.
            markup = MyBase.GetDesignTimeHtml()

        Catch ex As Exception
            markup = GetErrorDesignTimeHtml(ex)

        Finally
            ' Restore the properties to their original settings.
            myGV.BorderStyle = oldBorderStyle
            myGV.BorderWidth = oldBorderWidth
            myGV.BorderColor = oldBorderColor
        End Try

    Else
        ' Call the base method to generate the markup.
        markup = MyBase.GetDesignTimeHtml()
    End If

    ' Look for a <caption> tag.
    charX = markup.IndexOf(capTag)
    If charX > 0 Then

        ' Replace the first caption with 
        ' "tr><td colspan=9 align=center".
        ' It is okay if the colspan exceeds the 
        ' number of columns in the table.
        markup = markup.Remove(charX, _
            capTag.Length).Insert(charX, trOpen)

        ' Replace the second caption with "td></tr".
        charX = markup.IndexOf(capTag, charX)
        If charX > 0 Then
            markup = markup.Remove(charX, _
                capTag.Length).Insert(charX, trClose)
        End If
    End If

    Return markup

End Function ' GetDesignTimeHtml

備註

GetDesignTimeHtml() 方法會執行下列動作：

AutoGenerateColumns如果屬性是空的，請將 Columns 控制項 true 的屬性設定為。
DataKeyNames如果無法取得資料來源的架構，請將控制項 null 的屬性設定為。
重新整理 TypeDescriptor 物件，強制 PreFilterProperties 呼叫方法。
呼叫基底方法以產生標記。

給繼承者的注意事項

如果您覆寫 GetDesignTimeHtml() 方法，請務必呼叫基底方法，因為它最終會透過數個覆寫層級、對 GridView 控制項呼叫或控制項的複本來產生標記。

另請參閱

適用於

GetDesignTimeHtml(DesignerRegionCollection)

取得標記，此標記可用來在設計階段呈現關聯控制項，並填入設計工具區域的集合中。

public:
 override System::String ^ GetDesignTimeHtml(System::Web::UI::Design::DesignerRegionCollection ^ regions);

public override string GetDesignTimeHtml (System.Web.UI.Design.DesignerRegionCollection regions);

override this.GetDesignTimeHtml : System.Web.UI.Design.DesignerRegionCollection -> string

Public Overrides Function GetDesignTimeHtml (regions As DesignerRegionCollection) As String

參數

regions: DesignerRegionCollection

DesignerRegionCollection，可在其中加入控制項設計階段檢視之可選取和可點選區域的定義。

傳回

String

String，包含在設計階段用來呈現 GridView 的標記。

範例

// Generate the design-time markup.
const string capTag = "caption";
const string trOpen = "tr><td colspan=9 align=center";
const string trClose = "td></tr";

public override string GetDesignTimeHtml()
{
    // Make the full extent of the control more visible in the designer.
    // If the border style is None or NotSet, change the border to
    // a wide, blue, dashed line. Include the caption within the border.
    MyGridView myGV = (MyGridView)Component;
    string markup = null;
    int charX;

    // Check if the border style should be changed.
    if (myGV.BorderStyle == BorderStyle.NotSet ||
        myGV.BorderStyle == BorderStyle.None)
    {
        BorderStyle oldBorderStyle = myGV.BorderStyle;
        Unit oldBorderWidth = myGV.BorderWidth;
        Color oldBorderColor = myGV.BorderColor;

        // Set the design-time properties and catch any exceptions.
        try
        {
            myGV.BorderStyle = BorderStyle.Dashed;
            myGV.BorderWidth = Unit.Pixel(3);
            myGV.BorderColor = Color.Blue;

            // Call the base method to generate the markup.
            markup = base.GetDesignTimeHtml();
        }
        catch (Exception ex)
        {
            markup = GetErrorDesignTimeHtml(ex);
        }
        finally
        {
            // Restore the properties to their original settings.
            myGV.BorderStyle = oldBorderStyle;
            myGV.BorderWidth = oldBorderWidth;
            myGV.BorderColor = oldBorderColor;
        }
    }
    else
    {
        // Call the base method to generate the markup.
        markup = base.GetDesignTimeHtml();
    }

    // Look for a <caption> tag.
    if ((charX = markup.IndexOf(capTag)) > 0)
    {
        // Replace the first caption with 
        // "tr><td colspan=9 align=center".
        // It is okay if the colspan exceeds the 
        // number of columns in the table.
        markup = markup.Remove(charX,
            capTag.Length).Insert(charX, trOpen);

        // Replace the second caption with "td></tr".
        if ((charX = markup.IndexOf(capTag, charX)) > 0)
            markup = markup.Remove(charX,
                capTag.Length).Insert(charX, trClose);
    }
    return markup;
} // GetDesignTimeHtml

' Generate the design-time markup.
Private Const capTag As String = "caption"
Private Const trOpen As String = "tr><td colspan=9 align=center"
Private Const trClose As String = "td></tr"

Public Overrides Function GetDesignTimeHtml() As String

    ' Make the full extent of the control more visible in the designer.
    ' If the border style is None or NotSet, change the border to
    ' a wide, blue, dashed line. Include the caption within the border.
    Dim myGV As MyGridView = CType(Component, MyGridView)
    Dim markup As String = Nothing
    Dim charX As Integer

    ' Check if the border style should be changed.
    If (myGV.BorderStyle = BorderStyle.NotSet Or _
        myGV.BorderStyle = BorderStyle.None) Then

        Dim oldBorderStyle As BorderStyle = myGV.BorderStyle
        Dim oldBorderWidth As Unit = myGV.BorderWidth
        Dim oldBorderColor As Color = myGV.BorderColor

        ' Set the design-time properties and catch any exceptions.
        Try
            myGV.BorderStyle = BorderStyle.Dashed
            myGV.BorderWidth = Unit.Pixel(3)
            myGV.BorderColor = Color.Blue

            ' Call the base method to generate the markup.
            markup = MyBase.GetDesignTimeHtml()

        Catch ex As Exception
            markup = GetErrorDesignTimeHtml(ex)

        Finally
            ' Restore the properties to their original settings.
            myGV.BorderStyle = oldBorderStyle
            myGV.BorderWidth = oldBorderWidth
            myGV.BorderColor = oldBorderColor
        End Try

    Else
        ' Call the base method to generate the markup.
        markup = MyBase.GetDesignTimeHtml()
    End If

    ' Look for a <caption> tag.
    charX = markup.IndexOf(capTag)
    If charX > 0 Then

        ' Replace the first caption with 
        ' "tr><td colspan=9 align=center".
        ' It is okay if the colspan exceeds the 
        ' number of columns in the table.
        markup = markup.Remove(charX, _
            capTag.Length).Insert(charX, trOpen)

        ' Replace the second caption with "td></tr".
        charX = markup.IndexOf(capTag, charX)
        If charX > 0 Then
            markup = markup.Remove(charX, _
                capTag.Length).Insert(charX, trClose)
        End If
    End If

    Return markup

End Function ' GetDesignTimeHtml

備註

方法 GetDesignTimeHtml(DesignerRegionCollection) 會 GetDesignTimeHtml() 呼叫方法，以產生控制項設計階段轉譯的 GridView 標記。也會 GetDesignTimeHtml(DesignerRegionCollection) 針對設計階段轉譯的每個可點選或可選取區域填 regionsDesignerRegion 入物件。

GridView針對，每個資料列中的第一個儲存格都是可選取的;資料列中的所有儲存格都可以按一下。

給繼承者的注意事項

如果您覆寫 GetDesignTimeHtml(DesignerRegionCollection) 方法，請務必呼叫基底方法或 GetDesignTimeHtml() 多載，因為它們最終會透過數個覆寫層級呼叫控制項 GridView 或控制項複本來產生標記。

另請參閱

適用於

共用方式為

GridViewDesigner.GetDesignTimeHtml 方法

定義

多載

GetDesignTimeHtml()

傳回

範例

備註

給繼承者的注意事項

另請參閱

適用於

GetDesignTimeHtml(DesignerRegionCollection)

參數

傳回

範例

備註

給繼承者的注意事項

另請參閱

適用於

意見反應

其他資源