C# 在gridview中单击“删除”按钮/链接时创建警报时出错

我的目标是在尝试单击gridview中的delete按钮时创建一条警报消息。我正在使用asp.net C#。当我尝试运行程序时，遇到以下错误：

编译错误 描述：编译服务此请求所需的资源时出错。请查看以下特定错误详细信息，并适当修改源代码

编译器错误消息：CS0039:无法通过引用转换、装箱转换、取消装箱转换、换行转换或空类型转换将类型“System.Web.UI.WebControl.TableCell”转换为“System.Web.UI.WebControl.ImageButton”

源错误：

第211行：//如果您使用链接（而不是图像）作为命令按钮。 第212行：//LinkButton button=单元格作为ImageButton； 第213行：ImageButton按钮=控件作为ImageButton 第214行：if（button！=null&&button.CommandName==“Delete”） 第215行：//添加删除确认

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嗨，佩德罗，我不熟悉使用asp.net C进行编码，所以我很难完成我的项目。我正在使用Visual Studio 2008…如下所示：

<asp:TemplateField>              
<ItemTemplate>                  
<asp:LinkButton ID="lnkRemove" runat="server"  CommandArgument="<%# Eval("somethingthatidentifiesRow")%>"                      
OnClientClick="return confirm('Do you want to delete?')" Text="Delete"                       
OnClick="DeleteFunction">
</asp:LinkButton>              
</ItemTemplate>         
</asp:TemplateField>     

谢谢佩德罗。我马上就要拿到它了。但是还有一个问题。我应该在这里写些什么？>“身份证明行”？谢谢

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再次检查关于元素转换的错误，它表示您无法将tablecell元素转换为imagebutton元素，因此您对它进行了错误的对话。请正确找到合适的元素，然后按照下面的说明进行操作

您需要检查给定控件是否为ImageButton，如果不是，则需要为EAMPLE检查另一个控件

foreach (Control control in cell.Controls) 
{ 
  if(control is ImageButton)
  {
   ImageButton button = control as ImageButton; 
    //you code to atttach javascript with button
  }
  else
    continue;
}

或者，另一种方法是通过单元格中元素的id来查找控件，而不是循环

ImageButton btn = cell.FindControl("id_of_imagebutton") as ImageButton;
if(btn!=null)
{
  //you code to atttach javascript with button

}

从.aspx中执行此操作可能更容易

       <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID="lnkRemove" runat="server" 
                    CommandArgument='<%# Eval("somethingthatidentifiesRow")%>'
                    OnClientClick="return confirm('Do you want to delete?')" Text="Delete" 
                    OnClick="DeleteFunction"></asp:LinkButton>
            </ItemTemplate>
       <asp:TemplateField>

试试这样的

protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow) {
        // loop all data rows
        foreach (DataControlFieldCell cell in e.Row.Cells) {
            // check all cells in one row
            foreach (Control control in cell.Controls) {
                // Must use LinkButton here instead of ImageButton
                // if you are having Links (not images) as the command button.
                ImageButton button = control as ImageButton;
                if (button != null && button.CommandName == "Delete") {
                    // Add delete confirmation
                    button.OnClientClick = "if (!confirm('Are You Sure to Delete this Vehicle ?')) return;";
                }
            }
        }
    }
}

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" OnRowDataBound="GridView_RowDataBound"
                        AutoGenerateColumns="False" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None"
                        BorderWidth="1px" CellPadding="3" DataKeyNames="DEVICEID" DataSourceID="SqlDataSource1"
                        Font-Names="Arial" Font-Size="Smaller" HorizontalAlign="Center" PageSize="50"
                        Width="100%" EmptyDataText="No Vehicles Found Against the Selected Zone">
                        <RowStyle ForeColor="#000066" />
                        <Columns>
                            <asp:CommandField ShowEditButton=True    
                DeleteImageUrl="~/Images/del.jpg" DeleteText="Delete Record" ButtonType="Image" CancelImageUrl="~/Images/cancel.png" EditImageUrl="~/Images/edit.png" UpdateImageUrl="~/Images/tick.png">
                                <ItemStyle Font-Size="8pt" Width="30px" Wrap="False" />
        </asp:CommandField>

在网格视图中是这样的

protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow) {
        // loop all data rows
        foreach (DataControlFieldCell cell in e.Row.Cells) {
            // check all cells in one row
            foreach (Control control in cell.Controls) {
                // Must use LinkButton here instead of ImageButton
                // if you are having Links (not images) as the command button.
                ImageButton button = control as ImageButton;
                if (button != null && button.CommandName == "Delete") {
                    // Add delete confirmation
                    button.OnClientClick = "if (!confirm('Are You Sure to Delete this Vehicle ?')) return;";
                }
            }
        }
    }
}

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" OnRowDataBound="GridView_RowDataBound"
                        AutoGenerateColumns="False" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None"
                        BorderWidth="1px" CellPadding="3" DataKeyNames="DEVICEID" DataSourceID="SqlDataSource1"
                        Font-Names="Arial" Font-Size="Smaller" HorizontalAlign="Center" PageSize="50"
                        Width="100%" EmptyDataText="No Vehicles Found Against the Selected Zone">
                        <RowStyle ForeColor="#000066" />
                        <Columns>
                            <asp:CommandField ShowEditButton=True    
                DeleteImageUrl="~/Images/del.jpg" DeleteText="Delete Record" ButtonType="Image" CancelImageUrl="~/Images/cancel.png" EditImageUrl="~/Images/edit.png" UpdateImageUrl="~/Images/tick.png">
                                <ItemStyle Font-Size="8pt" Width="30px" Wrap="False" />
        </asp:CommandField>


像这样，只有当客户端说“是”并且您有一些东西可以识别行/单元格时，您才能到达“DeleteFunction”！编辑以添加所需的额外信息。请记住，asp:Template字段会进入您希望删除链接的gridview区域。如果您获得了所需信息，请不要将answer标记为Accepted。@macoy更新了关于.aspx.cs GridView1_RowDataBound的我的答案，因为您已单击/onClientClick均已就绪。
protected void GridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow) {
        // loop all data rows
        foreach (DataControlFieldCell cell in e.Row.Cells) {
            // check all cells in one row
            foreach (Control control in cell.Controls) {
                // Must use LinkButton here instead of ImageButton
                // if you are having Links (not images) as the command button.
                ImageButton button = control as ImageButton;
                if (button != null && button.CommandName == "Delete") {
                    // Add delete confirmation
                    button.OnClientClick = "if (!confirm('Are You Sure to Delete this Vehicle ?')) return;";
                }
            }
        }
    }
}

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" OnRowDataBound="GridView_RowDataBound"
                        AutoGenerateColumns="False" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None"
                        BorderWidth="1px" CellPadding="3" DataKeyNames="DEVICEID" DataSourceID="SqlDataSource1"
                        Font-Names="Arial" Font-Size="Smaller" HorizontalAlign="Center" PageSize="50"
                        Width="100%" EmptyDataText="No Vehicles Found Against the Selected Zone">
                        <RowStyle ForeColor="#000066" />
                        <Columns>
                            <asp:CommandField ShowEditButton=True    
                DeleteImageUrl="~/Images/del.jpg" DeleteText="Delete Record" ButtonType="Image" CancelImageUrl="~/Images/cancel.png" EditImageUrl="~/Images/edit.png" UpdateImageUrl="~/Images/tick.png">
                                <ItemStyle Font-Size="8pt" Width="30px" Wrap="False" />
        </asp:CommandField>