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AccessDataSourceDesigner.GetConnectionString 方法

  • 参考

定义

命名空间:
System.Web.UI.Design.WebControls
程序集:
System.Design.dll

为与此设计器关联的控件获取在设计时有效的连接字符串。

protected:
 override System::String ^ GetConnectionString();
protected override string GetConnectionString ();
override this.GetConnectionString : unit -> string
Protected Overrides Function GetConnectionString () As String

返回

String

对于关联的 String，AccessDataSource 包含其设计时连接。

示例

下面的代码示例演示如何使用 GetConnectionString 方法在设计时显示与控件占位符中的 控件关联的 AccessDataSource Microsoft Access 数据库的连接字符串。

此代码示例是为 AccessDataSourceDesigner 类提供的一个更大示例的一部分。

// Generate design time markup.
public override string GetDesignTimeHtml()
{
    // Generate a design-time placeholder containing the 
    // DataFile and the ConnectionString properties.
    // Split the ConnectionString into segments so it doesn't make
    // placeholder too wide.
    string[] connectParts = GetConnectionString().Split(new char[] { ';' });
    string connectString = "  " + connectParts[0];

    for (int i = 1; i < connectParts.Length; i++)
        connectString += ";<br>  " + connectParts[i].Trim();

    return CreatePlaceHolderDesignTimeHtml(
        "DataFile: " + DataFile + "<br />" +
        "Connection string:<br />" + connectString);
}

' Generate design time markup.
Public Overrides Function GetDesignTimeHtml() As String
    ' Generate a design-time placeholder containing the 
    ' DataFile and the ConnectionString properties.
    ' Split the ConnectionString into segments so it doesn't make
    ' placeholder too wide.
    Dim connectParts() As String
    connectParts = GetConnectionString().Split((";").ToCharArray())
    Dim connectString As String
    connectString = "  " & connectParts(0)

    Dim i As Integer
    For i = 1 To connectParts.Length - 1
        connectString &= ";<br>  " & connectParts(i).Trim()
    Next

    Return CreatePlaceHolderDesignTimeHtml( _
        "DataFile: " & DataFile & "<br />" & _
        "Connection string:<br />" & connectString)
End Function

注解

方法 GetConnectionString 将 DataFile 控件的 属性映射到设计器站点，然后使用 ConnectionString 控件的 属性生成连接字符串。

适用于

另请参阅