i got an NULLException Error at DataRow Creation

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Hi I got a NULLException Error at DataRow creation in a datatable...

This is the following code

C#

string des="";
        Decimal perc=0;
        string mnth="";
        string year="";

        da = new SqlDataAdapter("Select Employee_Id,yearly_Basic,Description_Name,Percentage,Monthly,Yearly from EmployeeSalary_structure where Employee_id='" + Session["Employee_id"].ToString() + "' ", con);
        da.Fill(ds, "EmployeeSalary");
     if (ds.Tables["EmployeeSalary"].Rows.Count > 0)
     { 
         txtbasicy.Text=ds.Tables["EmployeeSalary"].Rows[0][1].ToString();
         txtbasicm.Text= String.Format("{0:.##}",Convert.ToDecimal(txtbasicy.Text)/12);
            
         des=ds.Tables["EmployeeSalary"].Rows[0][2].ToString();
         perc=Convert.ToDecimal(ds.Tables["EmployeeSalary"].Rows[0][3].ToString());
         if (perc != 0)
         {
             mnth = Convert.ToString(Convert.ToDecimal(txtbasicm.Text) * (perc / 100));
             year = Convert.ToString(Convert.ToDecimal(txtbasicy.Text) * (perc / 100));
         }
         else
         {
             mnth = ds.Tables["EmployeeSalary"].Rows[0][4].ToString();
             year = ds.Tables["EmployeeSalary"].Rows[0][5].ToString();
         }

         const string key8 = "empsal1";
         DataTable dt2 = Session[key8] as DataTable;
         dbsal = (DataTable)Session["SessionTable5"];
        
         DataRow dr8 = dbsal.NewRow();//Here i got NULLException Error
         dr8[0] = des;
         dr8[1] = "";
         dr8[2] =perc; 
         dr8[3] =mnth;
         dr8[4] = year;
        
         dbsal.Rows.Add(des, "", perc, mnth, year);

         Session[key8] = dbsal;
         grdsalarybreakup.DataSource = dbsal;
         grdsalarybreakup.DataBind();     
     }

please help me...

thanks in advance

Posted 19-Nov-13 1:53am

Krish from Hyderabad

Updated 19-Nov-13 1:55am

Thomas ktg

v2

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Comments

Kornfeld Eliyahu Peter 19-Nov-13 7:57am

Session["SessionTable5"] is null.
Check the source for that Session["SessionTable5"]...

Thomas ktg 19-Nov-13 8:01am

Yes I agree to kornfeld. Check the null before creating new row.

Krish from Hyderabad 19-Nov-13 23:50pm

i got it...Thankyou for your suggestion

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samit kaneriya · Accepted Answer · 2013-11-19T02:09:00

use this
-----------

C#

string des = "";
                Decimal perc = 0;
                string mnth = "";
                string year = "";

                da = new SqlDataAdapter("Select Employee_Id,yearly_Basic,Description_Name,Percentage,Monthly,Yearly from EmployeeSalary_structure where Employee_id='" + Session["Employee_id"].ToString() + "' ", con);
                da.Fill(ds);
                if (ds!=null && ds.Tables.Count >0 && ds.Tables[0].Rows.Count > 0)
                {
                    txtbasicy.Text = ds.Tables[0].Rows[0][1].ToString();
                    txtbasicm.Text = String.Format("{0:.##}", Convert.ToDecimal(txtbasicy.Text) / 12);

                    des = ds.Tables[0].Rows[0][2].ToString();
                    perc = Convert.ToDecimal(ds.Tables[0].Rows[0][3].ToString());
                    if (perc != 0)
                    {
                        mnth = Convert.ToString(Convert.ToDecimal(txtbasicm.Text) * (perc / 100));
                        year = Convert.ToString(Convert.ToDecimal(txtbasicy.Text) * (perc / 100));
                    }
                    else
                    {
                        mnth = ds.Tables[0].Rows[0][4].ToString();
                        year = ds.Tables[0].Rows[0][5].ToString();
                    }

                    const string key8 = "empsal1";
                    DataTable dt2 = Session[key8] as DataTable;
                    dbsal = (DataTable)Session["SessionTable5"];

                    DataRow dr8 = dbsal.NewRow();//Here i got NULLException Error
                    dr8[0] = des;
                    dr8[1] = "";
                    dr8[2] = perc;
                    dr8[3] = mnth;
                    dr8[4] = year;

                    dbsal.Rows.Add(dr8);

                    Session[key8] = dbsal;
                    grdsalarybreakup.DataSource = dbsal;
                    grdsalarybreakup.DataBind();
                }