LinkButton Send Value to Code Behind OnClick

Question

I have a ASP LinkButton Control and I was wondering how to send a value to the code behind when it is clicked? Is that possible with this event?

<asp:LinkButton ID="ENameLinkBtn" runat="server" 
    style="font-weight: 700; font-size: 8pt;"
    onclick="ENameLinkBtn_Click" ><%# Eval("EName") %></asp:LinkButton>

Kelsey · Accepted Answer · 2011-03-21 18:06:04Z

78

Just add to the CommandArgument parameter and read it out on the Click handler:

<asp:LinkButton ID="ENameLinkBtn" runat="server" 
    style="font-weight: 700; font-size: 8pt;" CommandArgument="YourValueHere" 
    OnClick="ENameLinkBtn_Click" >

Then in your click event:

protected void ENameLinkBtn_Click(object sender, EventArgs e)
{
    LinkButton btn = (LinkButton)(sender);
    string yourValue = btn.CommandArgument;
    // do what you need here
}

Also you can set the CommandArgument argument when binding if you are using the LinkButton in any bindable controls by doing:

CommandArgument='<%# Eval("SomeFieldYouNeedArguementFrom") %>'

answered Mar 21, 2011 at 18:06

Kelsey

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1 Comment

Dana Over a year ago

You can declare the sender as LinkButton and skip the typecasting: protected void ENameLinkBtn_Click(LinkButton sender, EventArgs e) { string yourValue = sender.CommandArgument; // do what you need here } (Sorry, I tried but I CANNOT format the code)

Ken Pespisa · Accepted Answer · 2011-03-21 17:52:53Z

4

Add a CommandName attribute, and optionally a CommandArgument attribute, to your LinkButton control. Then set the OnCommand attribute to the name of your Command event handler.

<asp:LinkButton ID="ENameLinkBtn" runat="server" CommandName="MyValueGoesHere" CommandArgument="OtherValueHere" 
          style="font-weight: 700; font-size: 8pt;" OnCommand="ENameLinkBtn_Command" ><%# Eval("EName") %></asp:LinkButton>

<asp:Label id="Label1" runat="server"/>

Then it will be available when in your handler:

protected void ENameLinkBtn_Command (object sender, CommandEventArgs e)
{
   Label1.Text = "You chose: " + e.CommandName + " Item " + e.CommandArgument;
}

More info on MSDN

answered Mar 21, 2011 at 17:52

Ken Pespisa

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Comments

dustyhoppe · Accepted Answer · 2011-03-21 17:32:37Z

1

Try and retrieve the text property of the link button in the code behind:

protected void ENameLinkBtn_Click (object sender, EventArgs e)
{
   string val = ((LinkButton)sender).Text
}

edited Mar 21, 2011 at 17:32

answered Mar 21, 2011 at 17:14

dustyhoppe

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