无法从gridview链接按钮调用事件

Question

basically i wish to set a session folo by button click, but i failed to do so

i failed to call abcde function(), don't know what to set,i did try onRowCommand,onDataBound,OnDataBinding

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1">

my link button on gridview

<asp:LinkButton ID="lnkname" runat="server" Text='<%#Eval("movieTitle") %>' Width=500 CommandName="cmdLink">

in order to find link button control i did try DataGridItemEventArgs, but it didnt work as well

 protected void abcde(object sender, GridViewCommandEventArgs e)
    {
  if (e.CommandName == "cmdLink")
        {

             string path = //some path;

            Session["path"] = path;

((LinkButton)e.Item.FindControl("lnkname")).PostBackUrl = "~/somewhere/ + Session["path"].ToString()";

        }
    }

yi do so is because my next page function is depend on the session

Answer 1

i use gridview RowCommand the aspx code snippet

<asp:TemplateField>
    <ItemTemplate>
         <asp:LinkButton ID="btnLink" runat="server" CommandName="btnLinkClick" 
                 CommandArgument='<%# Bind("roll") %>'  Text="Find Name"></asp:LinkButton>
    </ItemTemplate>
</asp:TemplateField>

the code behind snippet

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "btnLinkClick")
        {
            string path = //some path;
            Session["path"] = path;

            var button = e.CommandSource as LinkButton;
            button.PostBackUrl = path;
        }
    }

here an interesting thing is if u set a postbackurl then second time you didn't get to server side it goes to your given url

if you simply want to set url, it is quite easy you can make a property url then bind it through button.PostBackUrl . also if u need some value from client side then set eventagument

Answer 2

you need to set CommandArgument in likbutton declaration, so that you can use it for binding. GridViewRowcommandEvents

protected void abcde(object sender, GridViewCommandEventArgs e)
    {
      if (e.CommandName == "cmdLink")
        {
        string path = //some path;
        Session["path"] = path;
        LinkButton objButton = (LinkButton)e.Item.FindControl("lnkname"); //this is you are missing 
        objButton.PostBackUrl = "~/somewhere/" + Session["path"].ToString()";
        }
    }

Answer 3

Ok, I'm not entirely sure what you mean, however in case you're asking how to manipulate controls within the grid on databinding, it goes like this:

    protected void grdvResults_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.DataItem != null)
        {
           ((LinkButton)e.Row.FindControl("lnkname")).PostBackUrl = "~/somewhere/" + Session["path"].ToString();
        }
    }