vb.net - 带有可变按钮文本的 VB.NET 网格视图

Question

如何根据 gridview 中的值更改 Gridview 中按钮的文本

例如，在下面的代码中，对于年龄低于 40 的行，如何将按钮文本设置为 YOUNG，对于高于或等于 40 的行，如何将按钮文本设置为 OLD

<asp:GridView ID="GV_DataByGroupAct" runat="server" AutoGenerateColumns="False">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:BoundField DataField="Age" HeaderText="Age" />
        <asp:BoundField DataField="Hight" HeaderText="Hight" />
        <asp:ButtonField Text="Young/Old" />
    </Columns>
</asp:GridView>

谢谢

Answer 1

您需要处理RowDataBound网格视图的事件，以便在绑定时更改每行按钮文本的内容，如下所示：

Protected Sub GridView1_RowDataBound(sender As [Object], e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        ' Put logic here to check age and then update button text
    End If
End Sub

Answer 2

我会用TemplateField一个真正的Button控制和RowDataBound你的逻辑：

aspx：

<asp:GridView ID="GV_DataByGroupAct" runat="server" AutoGenerateColumns="False">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:BoundField DataField="Age" HeaderText="Age" />
        <asp:BoundField DataField="Hight" HeaderText="Hight" />
        <asp:TemplateField>
           <ItemTemplate>
              <asp:Button ID="BtnYoungOld" runat="server" Text="Young/Old" />
           </ItemTemplate>
       </asp:TemplateField>
    </Columns>
</asp:GridView>

代码隐藏：

Private Sub GV_DataByGroupAct_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles GV_DataByGroupAct.RowDataBound
    Select Case e.Row.RowType
        Case DataControlRowType.DataRow
            Dim row = DirectCast(e.Row.DataItem, DataRowView)
            Dim age As Int32 = Int32.Parse(row("age").ToString)
            Dim BtnYoungOld = DirectCast(e.Row.FindControl("BtnYoungOld"), Button)
            BtnYoungOld.Text = If(age < 40, "YOUNG", "OLD")
    End Select
End Sub