A
Amelyan
What is the common way in ASP.NET C# to pop up a confirmation dialog box?
E.g.
Are you sure you want to delete this item?
Yes No
E.g.
Are you sure you want to delete this item?
Yes No
B
Brock Allen
You can emit javascript to call "confirm('Do you want to continue?')"
A
Amelyan
Hi Brock,
I have implemented your suggestion. It works fine. Clicking on Delete
button invokes the confirm script which pops up the message. Then when user
click OK or Cancel, it invokes my server side btnDelete_Click handler.
However, I don't know how to get the value OK or Cancel in my button click
handler (please see TODO below). At that point, how do I get user input OK
(true) or Cancel (false)?
Thanks again,
Amelyan
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button btnDelete;
private void Page_Load(object sender, System.EventArgs e)
{
string jsConfirm = @"<script language='javascript'>
function confirmButton()
{
var agree=confirm('Delete this item?');
if (agree)
return true;
else
return false;
}
</script>";
Page.RegisterClientScriptBlock("confirm",jsConfirm);
btnDelete.Attributes.Add("onclick","return confirmButton();");
}
...
private void btnDelete_Click(object sender, System.EventArgs e)
{
// TODO: How do I know here whether user clicked OK or Cancel here?
Response.Write("<script>alert('User clicked OK or Cancel!!');</script>");
}
}
I have implemented your suggestion. It works fine. Clicking on Delete
button invokes the confirm script which pops up the message. Then when user
click OK or Cancel, it invokes my server side btnDelete_Click handler.
However, I don't know how to get the value OK or Cancel in my button click
handler (please see TODO below). At that point, how do I get user input OK
(true) or Cancel (false)?
Thanks again,
Amelyan
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button btnDelete;
private void Page_Load(object sender, System.EventArgs e)
{
string jsConfirm = @"<script language='javascript'>
function confirmButton()
{
var agree=confirm('Delete this item?');
if (agree)
return true;
else
return false;
}
</script>";
Page.RegisterClientScriptBlock("confirm",jsConfirm);
btnDelete.Attributes.Add("onclick","return confirmButton();");
}
...
private void btnDelete_Click(object sender, System.EventArgs e)
{
// TODO: How do I know here whether user clicked OK or Cancel here?
Response.Write("<script>alert('User clicked OK or Cancel!!');</script>");
}
}
B
Brock Allen
You should never make it to btnDelete_Click if they hit cancel. This works
for me and only calls the server event when they choose "OK":
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
_button.Attributes.Add("onclick", "return confirm('delete?');");
}
protected void _button_Click(object sender, EventArgs e)
{
Response.Write("Click");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<body>
<form id="form1" runat="server" >
<asp:Button runat="server" ID="_button" Text="Click" OnClick="_button_Click"
/>
</form>
</body>
</html>
for me and only calls the server event when they choose "OK":
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
_button.Attributes.Add("onclick", "return confirm('delete?');");
}
protected void _button_Click(object sender, EventArgs e)
{
Response.Write("Click");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<body>
<form id="form1" runat="server" >
<asp:Button runat="server" ID="_button" Text="Click" OnClick="_button_Click"
/>
</form>
</body>
</html>
A
Amelyan
Duh, 
Thank you!
Amelyan
Thank you!
Amelyan
Brock Allen said:
S
Steve C. Orr [MVP, MCSD]
Here's some server side code that uses javascript to display a confirmation
message.
myDeleteButton.Attributes.Add("onclick", _
"return confirm('Are you sure you want to delete?');")
In this example, the Delete button will post back only if the person
confirms they want to delete. Otherwise your server code is never called in
response to the button click.
Here's a more detailed analysis of your options:
http://SteveOrr.net/articles/clientsidesuite.aspx
And here's information about making this technique work with a datagrid:
http://www.dotnetjunkies.com/HowTo/1E7FEE4A-795C-4D33-A135-843EB07C94A8.dcik
message.
myDeleteButton.Attributes.Add("onclick", _
"return confirm('Are you sure you want to delete?');")
In this example, the Delete button will post back only if the person
confirms they want to delete. Otherwise your server code is never called in
response to the button click.
Here's a more detailed analysis of your options:
http://SteveOrr.net/articles/clientsidesuite.aspx
And here's information about making this technique work with a datagrid:
http://www.dotnetjunkies.com/HowTo/1E7FEE4A-795C-4D33-A135-843EB07C94A8.dcik