如何在 GridView RowDataBound DataRow 中设置列格式答案

【问题标题】：How set Column format in GridView RowDataBound DataRow如何在 GridView RowDataBound DataRow 中设置列格式
【发布时间】：2016-05-05 19:56:45
【问题描述】：

我有一个 GridView，在它的 RowDataBound 事件中，我试图将列的格式设置为“dd MMM yyyy”。我首先检查RowType是否为DataRow，我的代码如下所示：

        If e.Row.RowType = System.Web.UI.WebControls.DataControlRowType.DataRow Then
        Dim ColCount As Integer
        ColCount = e.Row.Cells.Count

        For looper = 0 To ColCount - 1

            Dim cell As TableCell = e.Row.Cells(looper)
            ' For now I have hardcoded the Table Name
            Dim TempTabName As String = "STAFF"
            Dim TempColName As String
            Dim TempColType As String

            Dim CurrCol As BoundField = DirectCast(DirectCast(e.Row.Cells(looper), DataControlFieldCell).ContainingField, BoundField)
            ' Extracting Column Name
            TempColName = CurrCol.HeaderText
            ' Extracting Column Type (varchar, datetime etc)
            TempColType = GetColType(TempTabName, TempColName)

            ' Depending on Column Type Set Format
            ' Depending on Column Type Set Format
            Select Case TempColType
                Case "varchar"
                    status.Text = "We are at varchar"
                Case "nvarchar"
                    status.Text = "We are at nvarchar"
                Case "char"
                    status.Text = "We are at char"
                Case "datetime"
                    status.Text = "We are at datetime"
                    CurrCol.DataFormatString = "{0:dd/MM/yy}"                    
                Case "date"
                    status.Text = "We are at date"
                Case "time"
                    status.Text = "We are at time"
                Case "float"
                    status.Text = "We are at float"
            End Select
        Next
    End If

当我在 CurrCol.DataFormatString 行上运行此代码时，我收到错误“System.Web.dll 中发生'System.NotSupportedException' 类型的异常，但未在用户代码中处理”。附加信息：不支持指定的方法

谁能告诉我我做错了什么？或者有人可以用一些示例代码来解释如何实现同样的效果吗？

【问题讨论】：

标签： vb.net gridview

【解决方案1】：

您可以在 Gridview HTML Markup 中直接设置日期格式。

如果您使用 itemTemplate，那么您的示例代码如下所示

  <asp:GridView ID="GridView1" runat="server">
    <Columns>
    <asp:TemplateField>
      <ItemTemplate>
           <asp:Label 
           ID="Label1" 
           runat="server" 
           Text='<%# DataBinder.Eval(Container.DataItem, "date_of", "{0:dd MMM yyyy}") %>'>
        </asp:Label> 
      </ItemTemplate>
    </asp:TemplateField>
    </Columns> 
</asp:GridView>

这里date_of如果你想格式化的列名

【讨论】：