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Hello
I am working on application which requires to generate dynamic columns in gridview and then bound with linkbutton.
this much is done , but i have to add click event to link button but event is not fired .
below is code which i have tried.
below code is inside rowbound event of gridview.

What I have tried:

foreach (DateTime dt in days)
{
LinkButton lb = new LinkButton();

lb.ID = "lb" + i;
lb.Attributes.Add("runat", "server");
lb.Text = r1[dt.Date.ToString("dd-MM-yyyy")].ToString();
lb.CommandName = "UpDate";
lb.Command += lb_Command;
// lb.OnClientClick += new EventHandler(onLinkClick);
// lb.Click += new System.EventHandler(onLinkClick);
// lb.DataBinding += lb_DataBinding;


row.Cells[i + 2].Controls.Add(lb);
i++;
if (dt.Date <= System.DateTime.Today)
{
lb.Enabled = false;
}
}
}
Posted
Updated 21-Jun-16 7:37am
Comments
F-ES Sitecore 21-Jun-16 5:50am
   
Does that code run on post back also?
Member 11360268 21-Jun-16 5:53am
   
didnt get u , it run during gridview binding
F-ES Sitecore 21-Jun-16 5:56am
   
Does the binding happen when you do a page postback though, or do you only bind when it isn't a postback? You have to re-create your links and re-attach the events on postback or else they don't fire.
Member 11360268 21-Jun-16 8:18am
   
ohk, it is presently not binding on postback .i ll try binding on postback

1 solution

You may need to create the control at RowCreated event instead. Here's a working code for your reference:

ASPX:
ASP.NET
<asp:content id="Content2" contentplaceholderid="MainContent" runat="server" xmlns:asp="#unknown">
    <asp:gridview id="GridView1" runat="server" onrowcreated="GridView1_RowCreated">
        <columns>
                <asp:templatefield>
                    <itemtemplate>
                        <asp:placeholder id="PlaceHolder1" runat="server"></asp:placeholder>
                        </itemtemplate>
                </asp:templatefield>
         </columns>
    </asp:gridview>
</asp:content>


CODE BEHIND:

C#
using System;
using System.Web.UI.WebControls;
using System.Data;

namespace WebFormDemo
{
    public partial class DynamicControlInGridView : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e) {
            if (!IsPostBack)
                BindGridView();
        }

        protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e) {
            if (e.Row.RowType == DataControlRowType.DataRow) {

                LinkButton lb = new LinkButton();
                lb.ID = "LinkButton1";
                lb.Text = "Click Me!";
                lb.Click += OnLinkClick;

                PlaceHolder p = (PlaceHolder)e.Row.FindControl("PlaceHolder1");
                p.Controls.Add(lb);

            }
        }

        protected void OnLinkClick(object sender, EventArgs e) {
            LinkButton lb = (LinkButton)sender;
            GridViewRow row = (GridViewRow)lb.NamingContainer;
            if (row != null) {
                Response.Write("Found it!");
            }
        }

        private void BindGridView() {
            GridView1.DataSource = CreateDataSource();
            GridView1.DataBind();
        }

        public DataTable CreateDataSource() {
            DataTable dt = new DataTable();
            DataRow dr;

            dt.Columns.Add(new DataColumn("ID", typeof(string)));
            dt.Columns.Add(new DataColumn("Name", typeof(string)));
            dt.Columns.Add(new DataColumn("Lastname", typeof(string)));

            dr = dt.NewRow();
            //add values to each columns
            dr["ID"] = 1;
            dr["Name"] = "Vincent";
            dr["LastName"] = "Durano";
            dt.Rows.Add(dr);
            return dt;
        }
    }
}
   

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