How to do a PostBack from a Text Link

Posts: 174 · Posted: Fri Jul 20, 2007 6:49 pm

Even though I have it working its not working the way I want.

The idea is to have some text directly call one of my ServerSided ASP.NET functions.

Basically I am trying to delete photos

This is the code in my Page_Load function

Code:

//delete photo
if(Page.IsPostBack){
   if(Request.Form["__EVENTARGUMENT"]!=""){
      deletephoto(Request.Form["__EVENTARGUMENT"]);
   }
}

This is the code in my function that deletes the photo

Code:

void deletephoto(string id){
// get photo
Response.Write("function called for "+id);
string photo=countDB3("SELECT filename FROM blogs_photos WHERE id='"+id+"'");
if(photo!=""){
   //delete photo
   string filepath="blogs/large/"+photo;
   File.Delete(Server.MapPath(filepath));

   filepath="blogs/medium/"+photo;
   File.Delete(Server.MapPath(filepath));

   filepath="blogs/small/"+photo;
   File.Delete(Server.MapPath(filepath));

   filepath="blogs/thumb/"+photo;
   File.Delete(Server.MapPath(filepath));
}
insertToDB("DELETE FROM blogs_photos WHERE id='"+id+"'");
}

Here is a javascript function from the client side

Code:

function deletepic(picid)
{
__doPostBack('deletephoto',picid);
}

and here is the text link

Code:

<a href="javascript:deletepic('id_of_photo');">DELETE</a>

What I want to do is directly call my deletephoto ASP.NET function without the check in my Page_Load to see if its a PostBack. Is there anyway to do this?

Posts: 746 · Posted: Fri Aug 03, 2007 7:58 pm

Pretty sure it'll always fire the page load - i usually check for a negative though like below...

Code:

<asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click" CommandName='123'>LinkButton</asp:LinkButton>

Code:

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//I won't fire when the linkbutton is clicked
int i = 1;
}
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
deletephoto(LinkButton1.CommandName);
}

Any help?

You doing this in a grid or just somewhere on the page?