在Asp.Net页面上单击“删除”按钮时创建确认消息

Question

i use this codes for a Delete button for a confirmation message :

<asp:Button runat="server" ID="btnDelete" 
 OnClick="btnDelete_Click" 
 OnClientClick="return confirm('Do you want to delete the record ? ');" />

Here is the way to add confirm client script at server side :

btnDelete.Attributes.Add("onclick", 
    "return confirm('Do you want to delete the record ? ');")

but I'm getting the (Type Expected) error when debugging could anyone help please? Thanks

Answer 1

If you already assigned OnClientClick="return confirm('Do you want to delete the record ? ');" in your markup you don't need add an attribute again. It may be the reason.

Comment out from server

//btnDelete.Attributes.Add("onclick", 
    "return confirm('Do you want to delete the record ? ');")

Answer 2

The client side markup you have is correct and must work.

If you want to generate the JavaScript code from server side, then remove the related markup OnClientClick. You're duplicating client event handling.

Note: Instead of "onclick" attribute, consider using event attaching on page load (ie: using jquery).

Example:

$(".btn-delete").click(function() { /*do something here*/ });

Answer 3

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

    {
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                foreach (Button button in e.Row.Cells[12].Controls.OfType<Button>())

                {
                    if (button.CommandName == "Delete")
                    {
                        button.Attributes["onclick"] = "if(!confirm('Do you want to delete')){return false;};";
                    }

                }