Dynamic DataTable in gridview

Hi

I had same problem.You have to check following code i think it will help you.

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Temp : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            //Create dummy data
            DataTable dt = new DataTable();
            dt.Columns.Add("ChargeCode");
            dt.Columns.Add("ChargeAmount");
            dt.Columns.Add("StopNumber");

            Session["ChargeDataTable"] = dt;
            
            //Bind the gridview
            BindGrid();
        }

        //Recurses through the controls to show the naming of each individual control that is currently in the gridview
        //RecurseControls(GridView1.Controls[0].Controls);
        //Label1.Text += GridView1.Controls[0].Controls[0].GetType().Name + "
";  
    }

    void RecurseControls(ControlCollection ctls)
    {
        foreach (Control ctl in ctls)
        {
            if (!ctl.HasControls())
                Label1.Text += ctl.ClientID + " " + ctl.GetType().Name + "<br />";
            else
                RecurseControls(ctl.Controls);
        }
    }

    void BindGrid()
    {
        DataTable dt = new DataTable();
        dt = (DataTable)Session["ChargeDataTable"];

        //Bind the gridview
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }

    void AddNewCharge(string ChargeCode, string ChargeAmount, string StopNumber)
    {
        DataTable dt = new DataTable();

        dt = (DataTable)Session["ChargeDataTable"];

        DataRow dr = dt.NewRow();
        dr["ChargeCode"] = ChargeCode;
        dr["ChargeAmount"] = ChargeAmount;
        dr["StopNumber"] = StopNumber;
        dt.Rows.Add(dr);

        Session["ChargeDataTable"] = dt;

        BindGrid();
    }

    protected void GridView1_RowCommand1(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "EmptyInsert")
        {
            //handle insert here
            TextBox ChargeCode = GridView1.Controls[0].Controls[0].FindControl("txtChargeCodeEmptyInsert") as TextBox;
            TextBox ChargeAmount = GridView1.Controls[0].Controls[0].FindControl("txtChargeAmountEmptyInsert") as TextBox;
            TextBox StopNumber = GridView1.Controls[0].Controls[0].FindControl("txtStopNumberEmptyInsert") as TextBox;

            AddNewCharge(ChargeCode.Text, ChargeAmount.Text, StopNumber.Text);

            //Label1.Text = string.Format("You would have inserted the name : {0} from the emptydatatemplate",tbEmptyInsert.Text);
        }

        if (e.CommandName == "Insert")
        {
            //handle insert here
            TextBox ChargeCode = GridView1.FooterRow.FindControl("txtChargeCodeInsert") as TextBox;
            TextBox ChargeAmount = GridView1.FooterRow.FindControl("txtChargeAmountInsert") as TextBox;
            TextBox StopNumber = GridView1.FooterRow.FindControl("txtStopNumberInsert") as TextBox;

            AddNewCharge(ChargeCode.Text, ChargeAmount.Text, StopNumber.Text);
            //Label1.Text = string.Format("You would have inserted the name :  {0} from the footerrow", tbInsert.Text);
        }
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        BindGrid();
    }

If you want to get more detail about this code than just go for this below link.

http://forums.asp.net/t/1204756.aspx
}

Here is an excellent solution for your requirement.
http://www.c-sharpcorner.com/uploadfile/purankaushal/gridjavascript05212008014115am/gridjavascript.aspx
Another way.
1. Find the textbox control in the RowDataBound or ItemDataBound event of the grid view.
2. Add the attributes to that textbox like.. Textbox1.Attributes.Add("OnClick", "Javascript function name");
3. In the javasscript function, you can implement your client side validation.