unable to update gridview
<p>Please help ,i have added update/edit command button in gridview so to update data in my sql server database but am unable to do it. Data is not updated in database .
======code for onrowupdate========================================
protected void gRowUpdate(object sender, GridViewUpdateEventArgs e)
{
    Books b = null;
    b = new Books();
    DataTable dt=null;
    GridView g = (GridView)sender;
    try
    {   dt=new DataTable();
        b = new Books();
        b.author = Convert.ToString(g.Rows[e.RowIndex].FindControl("Author"));
        b.bookID = Convert.ToInt32(g.Rows[e.RowIndex].FindControl("BookID"));
        b.title = Convert.ToString(g.Rows[e.RowIndex].FindControl("Title"));
        b.price = Convert.ToDouble(g.Rows[e.RowIndex].FindControl("Price"));
        // b.rec = Convert.ToString(g.Rows[e.RowIndex].FindControl("Date_of_reciept"));
        b.ed = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.bill = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.cre_by = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.src = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.pages = Convert.ToInt32(g.Rows[e.RowIndex].FindControl("Edition"));
        b.pub = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.mod_by = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.remark = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        //  b.year = Convert.ToString(g.Rows[e.RowIndex].FindControl("Edition"));
        b.updatebook(b);
        g.EditIndex = -1;
        dt = b.GetAllBooks();
        g.DataSource = dt;
        g.DataBind();
    }
    catch (Exception ex)
    {
        throw (ex);
    }
    finally
    {
        b = null;
    }</p>

<p>}
===================My stored procedure for update book able to update database by exec in sqlserver mgmt studio==========================
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go</p>

<p>ALTER PROCEDURE [dbo].[usp_updatebook]
@bookid bigint,
@author varchar(50),
@title varchar(50),
@price bigint,
@src_equisition varchar(50),
@bill_no varchar(50),
@publisher varchar(50),
@pages bigint,
@remark varchar(50),
@edition varchar(50),
@created_by varchar(50),
@modified_by varchar(50)
/*@date_of_reciept datetime,
@year_of_publication datetime*/
AS
declare 
 @modified_on datetime</p>

<p>set @modified_on=getdate()</p>

<p>UPDATE books</p>

<p>SET</p>

<p>author=@author, 
title=@title, 
price=@price,</p>

<p>src_equisition=@src_equisition,
bill_no=@bill_no,
publisher=@publisher,
/*Date_of_reciept=@date_of_reciept,*/
pages=@pages,
remark=@remark,
edition=@edition,
/*Year_of_publication=@year_of_publication,*/</p>

<p>created_by=@created_by,
modified_on=@modified_on,
modified_by=@modified_by</p>

<p>WHERE bookid=@bookid
========================class library function for update====================</p>

<pre><code>    public void updatebook(Books b)
    {
        DataAccess dbAccess = null;
        SqlCommand cmd = null;
        try
        {
            dbAccess = new DataAccess();
            cmd = dbAccess.GetSQLCommand("usp_updatebook", CommandType.StoredProcedure);
            cmd.Parameters.Add("@bookid", SqlDbType.VarChar, 50).Value = b.bookID;
            cmd.Parameters.Add("@author", SqlDbType.VarChar, 50).Value = b.author;
           cmd.Parameters.Add("@title", SqlDbType.VarChar, 50).Value = b.title;
            cmd.Parameters.Add("@price", SqlDbType.Money).Value = b.price;
            cmd.Parameters.Add("@publisher", SqlDbType.VarChar, 50).Value = b.pub;
          // cmd.Parameters.Add("@year_of_publication", SqlDbType.DateTime).Value =Convert.ToDateTime( b.year);
            cmd.Parameters.Add("@src_equisition", SqlDbType.VarChar, 50).Value = b.src;
            cmd.Parameters.Add("@bill_no", SqlDbType.VarChar, 50).Value = b.bill;
            cmd.Parameters.Add("@remark", SqlDbType.VarChar, 50).Value = b.remark;
            cmd.Parameters.Add("@pages", SqlDbType.Int).Value = b.pages;
            cmd.Parameters.Add("@edition", SqlDbType.VarChar, 50).Value = b.ed;
           // cmd.Parameters.Add("@date_of_reciept", SqlDbType.DateTime).Value = Convert.ToDateTime(b.rec);
            // cmd.Parameters.Add("@created_on", SqlDbType.DateTime).Value = Convert.ToDateTime(b.cre_on);
            cmd.Parameters.Add("@created_by", SqlDbType.VarChar, 50).Value = b.cre_by;
            //cmd.Parameters.Add("@modified_on", SqlDbType.DateTime).Value = Convert.ToDateTime(b.mod_on);
            cmd.Parameters.Add("@modified_by", SqlDbType.VarChar, 50).Value = b.mod_by;

            cmd.ExecuteNonQuery();

        }
        catch (Exception ex)
        {
            throw (ex);
        }
        finally
        {
            if (cmd.Connection != null &amp;&amp; cmd.Connection.State == ConnectionState.Open)
                cmd.Connection.Close();
            dbAccess = null;
            cmd = null;
        }
</code></pre>

<h1>        }</h1>

<p>I have also tried to do update by following way
protected void gv1_updating(object sender, GridViewUpdateEventArgs e)
        {
            GridView g = (GridView)sender;
            abc a = new abc();
            DataTable dt = new DataTable();
            try
            {</p>

<pre><code>            a.cd_Id = Convert.ToInt32(g.DataKeys[e.RowIndex].Values[0].ToString());
            //TextBox b = (TextBox)g.Rows[e.RowIndex].Cells[0].FindControl("cd_id");
            TextBox c = (TextBox)g.Rows[e.RowIndex].Cells[2].FindControl("cd_name");
            TextBox d = (TextBox)g.Rows[e.RowIndex].Cells[3].FindControl("version");
            TextBox f = (TextBox)g.Rows[e.RowIndex].Cells[4].FindControl("company");
            TextBox h = (TextBox)g.Rows[e.RowIndex].Cells[6].FindControl("created_by");
            TextBox i = (TextBox)g.Rows[e.RowIndex].Cells[8].FindControl("modified_by");

            //a.cd_Id = Convert.ToInt32(b.Text);
            a.cd_name = c.Text;
            a.ver = d.Text;
            a.comp = f.Text;
            a.cre_by = h.Text;
            a.mod_by = i.Text;
            a.updateDigi(a);
            g.EditIndex = -1;
            dt = a.GetAllDigi();
            g.DataSource = dt;
            g.DataBind();

        }
        catch(Exception ex)
        {
            throw (ex);
        }
        finally
        {
            dt = null;
            a = null;
            g = null;
        }



    }
</code></pre>

<p>=================== but have error of Index out of range exception=========</p>

<p>please do reply,thanxs in advance</p>
