CreateUserWizardDesigner.GetErrorDesignTimeHtml(Exception) 方法

定義

命名空間:

System.Web.UI.Design.WebControls

組件:

System.Design.dll

取得提供指定例外狀況 (Exception) 有關資訊的 HTML。 通常在設計階段發生錯誤之後才會呼叫這個方法。

protected:
 override System::String ^ GetErrorDesignTimeHtml(Exception ^ e);

protected override string GetErrorDesignTimeHtml (Exception e);

override this.GetErrorDesignTimeHtml : Exception -> string

Protected Overrides Function GetErrorDesignTimeHtml (e As Exception) As String

參數

e

Exception

發生的例外狀況。

傳回

String

指定例外狀況的 HTML。

範例

下列程式代碼範例示範如何覆寫 GetErrorDesignTimeHtml 方法，以在發生錯誤時，在設計介面上顯示偵錯資訊。

using System;
using System.IO;
using System.ComponentModel;
using System.Web.UI.WebControls;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.Design.WebControls;
//using Examples.WebNet.Design;

namespace Examples.WebNet
{
    // Create a class that extends CreateUserWizardDesigner.
    public class MyCreateUserWizardDesigner : CreateUserWizardDesigner
    {
        // This variable contains debugging information.
        private string debugInfo = "Useful information.";
        
        // Override the GetErrorDesignTimeHtml method to add some more
        // information to the error message.
        protected override string GetErrorDesignTimeHtml(Exception e)
        {
            // Get the error message from the base class.
            string html = base.GetErrorDesignTimeHtml(e);
        
            // Append the debugging information to it.
            html += "<br>" + "DebugInfo: " + debugInfo;
        
            // Return the error message.
            return html;
        }
    }
}

Imports System.IO
Imports System.ComponentModel
Imports System.Web.UI
Imports System.Web.UI.Design
Imports System.Web.UI.Design.WebControls
Imports System.Web.UI.WebControls
Imports Examples.WebNet

Namespace Examples.WebNet
    ' Create a class that extends CreateUserWizardDesigner.
    Public Class MyCreateUserWizardDesigner
        Inherits CreateUserWizardDesigner

        ' This variable contains debugging information.
        Private debugInfo As String = "Useful information."

        ' Override the GetErrorDesignTimeHtml method to add some more
        ' information to the error message.
        Protected Overrides Function GetErrorDesignTimeHtml(ByVal e As Exception) As String
            ' Get the error message from the base class.
            Dim htmlStr As String
            htmlStr = MyBase.GetErrorDesignTimeHtml(e)

            ' Append the debugging information to it.
            htmlStr &= "<br>DebugInfo: " & debugInfo

            ' Return the error message.
            Return htmlStr
        End Function
    End Class

End Namespace

另請參閱

• ASP.NET 控件設計工具概觀
• 擴充設計階段支援