在 ASP.Net“详细信息视图”图像按钮 OnClick 事件处理程序中传递参数



是否可以将 ASP.Net 图像按钮 OnClick 事件处理程序中的参数发送到代码隐藏文件?

在 DetailsView 中,我们为编辑模板在一周中的每一天都有此标记,最重要的是插入模板的另一组编码:

<EditItemTemplate>
    <asp:ImageButton 
        ID="ImageButtonEditDayOfWeekMonday" 
        runat="server" 
        ImageUrl='<%# getCheckboxImageToDisplay(Eval("DayOfWeekMonday"))%>' 
        Height="15"
        Width="15" 
        OnClick="ImageButtonEditDayOfWeekMonday_Click"
        CausesValidation="False">
    </asp:ImageButton>
</EditItemTemplate>

代码隐藏文件中的处理程序:

Protected Sub ImageButtonEditDayOfWeekTuesday_Click(sender As Object, e As ImageClickEventArgs)
    Dim imgTheImageButton As New ImageButton
    imgTheImageButton = DetailsView.FindControl("ImageButtonEditDayOfWeekTuesday")
    If imgTheImageButton.ImageUrl = "../../Images/checked.png" = True Then
        imgTheImageButton.ImageUrl = "../../Images/unchecked.png"
        LabelCheckBoxTuesday.Text = False
    Else
        imgTheImageButton.ImageUrl = "../../Images/checked.png"
        LabelCheckBoxTuesday.Text = True
    End If
End Sub

这将相当于大量的编码。

是否可以创建一个处理程序并像这样调用它?

OnClick="ImageButtonDayOfWeek_Click("Monday", "Edit")

所有处理程序之间的唯一区别是:

imgTheImageButton = DetailsView.FindControl("ImageButtonEditDayOfWeekTuesday")
最好

在单个处理程序中使用一堆if语句,并使用适当的"ID"放置在DetailsView.FindControl中。

在 ImageButton 中添加 CommandArgument 属性:

<EditItemTemplate>
<asp:ImageButton 
    ID="ImageButtonEditDayOfWeekMonday" 
    runat="server" 
    ImageUrl='<%# getCheckboxImageToDisplay(Eval("DayOfWeekMonday"))%>' 
    Height="15"
    Width="15" 
    OnClick="ImageButtonEditDayOfWeekMonday_Click"
    CommandArgument='<%# Eval("DayOfWeekMonday") %>'
    CausesValidation="False">
</asp:ImageButton>

然后在代码隐藏中:

Protected Sub ImageButtonEditDayOfWeekTuesday_Click(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs)
    //e.CommandArgument should contain the actual value of DayOfWeekMonday
    Dim arg As String = e.CommandArgument.ToString()
End Sub

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