Attach Data to AspButton control

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I have a document, with an ID (which i need). i am wanting to dynamically create a asp:Button control, that when clicked will trigger an event to then navigate the page to another URL with a query string of id= [documentID]

so how do i attach data (the documentId) to the dynamically created button, so when it clicks this information can be accessed from the event triggered? Any other ways of doing this are grateful too, i need to do this in C#, and normally i'd do it all in Javascript, so i'm a bit new.

Many Thanks

Posted 11-Mar-14 6:33am

Grant Weatherston

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**Shelby Robertson** · Accepted Answer · 2014-03-11T07:18:00

Solution 1

You can use CommandArgument to store the value, then get it back from the sender on the click event.

C#

protected void Page_Load(object sender, EventArgs e)
       {
           Button b = new Button();
           b.ID = "btnTest";
           b.CommandArgument = "42";
           b.Click += new EventHandler(btnTest_Click);
           b.Text = "clickme";
           placeholder.Controls.Add(b);
       }

       protected void btnTest_Click(object sender, EventArgs e)
       {
           var button = (Button)sender;
           throw new Exception(button.CommandArgument.ToString());
       }

Posted 11-Mar-14 7:18am

Shelby Robertson

Comments

Grant Weatherston 12-Mar-14 6:34am

i've done this but its not firing the event, it just refreshes the page (postsback) its not actually running the event i assigned to the button.

Shelby Robertson 12-Mar-14 9:53am

Can you post your code?

Grant Weatherston 12-Mar-14 9:56am

its ok i've fixed it, i've added the dynamic button creating to the page_init method

Shelby Robertson 12-Mar-14 9:58am

ah, life cycle issue. Good Work!