Question

我正在尝试根据gridview里面的条件更改图像控件的图像url，这是我的标记：

<asp:TemplateField HeaderText="Status">
    <ItemTemplate>
        <asp:Image ID="Image1" runat="server"
            ImageUrl='<%# IIf(CDate(Eval("startdate")) < CDate(Eval("expdate")),"~/iWebmallManager/Images/bullet_red.png",
                "~/iWebmallManager/Images/bullet_green.png" %>'
        /> 
    </ItemTemplate>                                                  
    <HeaderStyle HorizontalAlign="Left" />
    <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
</asp:TemplateField>

IIf声明无效。我不知道我在做什么，请帮助

Answer 1

你应该在codebehind中这样做，因为它增加了可读性并且更容易调试：

Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        Dim rowView = DirectCast(e.Row.DataItem,DataRowView)
        Dim Image1 = DirectCast(e.Row.FindControl("Image1"),Image)
        Dim startdate = DirectCast(rowView("startdate"), Date)
        Dim expdate = DirectCast(rowView("expdate"), Date)
        If startDate < expdate
            Image1.ImageUrl = "~/iWebmallManager/Images/bullet_red.png"
        Else
            Image1.ImageUrl = "~/iWebmallManager/Images/bullet_green.png"
        End If
    End If
End Sub

在gridview控件中使用IIf

1 个答案: