How To bind sharepoint List with Grid view in Webpart? Part 3 - adding Checkbox

Question : How To bind sharepoint List with Grid view in Webpart? Part 3 adding Checkbox

Solution :  adding checkbox for selection  for this we have to write a class first.
name of class : CheckBoxSupportClass.cs)using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Web.UI.HtmlControls;
namespace WBP_TempWebPart
{
  public  class CheckBoxSupportClass:ITemplate
    {
        private ListItemType _itemType;
        private string _columnName;
        public CheckBoxSupportClass(ListItemType itemType, string columnName)
        {
            _itemType = itemType;
            _columnName = columnName;
        }
        #region ITemplate Members
        public void InstantiateIn(Control container)
        {
            switch (_itemType)
            {
                case ListItemType.Header:
                    LiteralControl header = new LiteralControl();
                    header.Text = string.Format("<b>{0}</b>", _columnName);
                    container.Controls.Add(header);
                    break;
                case ListItemType.Item:
                    CheckBox checkboxitem = new CheckBox();
                    checkboxitem.ID = "selectedTask";
                    checkboxitem.Visible = true;
                    container.Controls.Add(checkboxitem);
                    HtmlInputHidden taskIdItem = new HtmlInputHidden();
                    taskIdItem.ID = "taskIdItem";
                    container.Controls.Add(taskIdItem);
                    break;
                default:
                    break;
            }
        }
        #endregion
    }
}
--------------------------------
and then
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2) Now by adding reference of the above class we have to code the following
 private void BindGridWithList() {
           
SPGridView oGrid = new SPGridView();
            SPSite site = SPContext.Current.Site;
            SPWeb web = SPContext.Current.Web;
            SPList list = web.Lists["Personnel"];
            SPQuery myquery = new SPQuery();
            myquery.Query = "<Where><Neq><FieldRef Name='EmployeeName' /><Value Type='Text'> </Value></Neq></Where><OrderBy><FieldRef Name='EmployeeName' Ascending='True' /></OrderBy>";
            SPListItemCollection myitemcol = list.GetItems(myquery);
           
            TemplateField selectTaskColumn = new TemplateField();
            selectTaskColumn.HeaderText = "Select Task";
            selectTaskColumn.ItemTemplate = new CheckBoxSupportClass(ListItemType.Item, "Select Task");
            oGrid.Columns.Add(selectTaskColumn);
                       
            DataTable table = new DataTable();
           
            //table.Columns.Add("Select");
            table.Columns.Add("Employee Name");
            table.Columns.Add("Employee Group");
            table.Columns.Add("Employee JobRole");
            table.Columns.Add("Status");
            table.Columns.Add("Last Taken");
            table.Columns.Add("Applied Assignment");
            string status = string.Empty;
            foreach (SPListItem item in myitemcol){
                DataRow row = table.NewRow();
                //row["Select"] = string.Empty;
                row["Employee Name"] = item["EmployeeName"].ToString();
                row["Employee Group"] = item["EmployeeGroup"].ToString();
               
                //row["Employee JobRole"] = item["EmployeeJobRole"].ToString();
                row["Employee JobRole"] = GetJobRole(item["EmployeeJobRole"].ToString());
               
                //to do call the function for find out the course status, last taken and applied assignment
                //FindCourseStatusFromAssignment(item["EmployeeName"].ToString(), "LastTaken", "AppliedAssignment");
                status = FindCourseStatusFromAssignment(item["EmployeeName"].ToString(), "LastTaken", "AppliedAssignment");
                //row["Status"] = status;
                row["Status"] = GetJobRole(status);
                table.Rows.Add(row);
            }
            DataView mydataview = new DataView(table);
            //table = mydataview.ToTable(true,"Select", "EmployeeName", "EmployeeGroup", "EmployeeJobRole", "Status");//, "Select Country", "Select State");
            table = mydataview.ToTable(true,  "Employee Name", "Employee Group", "Employee JobRole", "Status","Last Taken","Applied Assignment");//, "Select Country", "Select State");
            oGrid.DataSource = table;
            //oGrid.TemplateControl.Controls.Add(chkBox);
            oGrid.DataBind();
        }