pass value to textbox from dataset oncombobox selectedindex changed

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.NET2.0

.NET3.5

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I want to get the details of employee in textbox on combobox selected index changed event. I have done the following code. but when I run the project it shows an error that there is no row at position 0.
Thanks in Advance !!!

C#

private void cmbEmp_ID_SelectedIndexChanged(object sender, EventArgs e)
        {
            //string F_name, L_name, dob, Desig, dept, join_date;
            //string var = cmbEmp_ID.SelectedValue.ToString();
            //fillData(var);
            string a = cmbEmp_ID.SelectedValue.ToString();
            fillData(a);
        }

        public void fillData(string lvVar)
        {
            string cnstr = ConfigurationManager.ConnectionStrings["abc_ConnectionString"].ConnectionString;
            SqlConnection cont = new SqlConnection(cnstr);
            SqlDataAdapter adp = new SqlDataAdapter("Select First_Name, Last_Name, DOB, Designation, Department, Join_Date from Employee where Emp_ID = '" + lvVar + "'", cont);
            DataSet ds = new DataSet();
            adp.Fill(ds);
            DataTable dt = ds.Tables[0];
            txtFirst_Name.Text = dt.Rows[0]["First_Name"].ToString();
            txtLast_Name.Text = dt.Rows[0]["Last_Name"].ToString();
        }

Posted 9-Feb-12 22:54pm

Ank_ush

Updated 9-Feb-12 23:09pm

Jαved

v2

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3 solutions

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MadhuCodePro · Answer 1 · 2012-02-09T23:02:00

Solution 1

I think you are getting error on below line of code.

CSS

txtFirst_Name.Text = dt.Rows[0]["First_Name"].ToString();

check the row count of the datatable before getting the row from datatable.
And also cmbEmp_ID.SelectedValue should not be a null value.

Posted 9-Feb-12 23:02pm

MadhuCodePro

Updated 9-Feb-12 23:03pm

v2

Jαved · Answer 2 · 2012-02-09T23:17:00

I think the problem is with emp_id column. You are considering it as String but in the Database you might have its datatype as Integer/ Number.

If the emp_id column is numeric then use -

C#

Convert.ToInt32(lvVar);

in your code as-

C#

SqlDataAdapter adp = new SqlDataAdapter("Select First_Name, Last_Name, DOB, Designation, Department, Join_Date from Employee where Emp_ID = " + Convert.ToInt32(lvVar) + "", cont);

Otherwise rest of the code is correct i think...

Aniket Yadav · Answer 3 · 2012-02-09T23:25:00

Solution 3

C#

private void cmbEmp_ID_SelectedIndexChanged(object sender, EventArgs e)
        {
            if(cmbEmp_ID.SelectedIndex != -1) //Check For This First
            {
                string a = cmbEmp_ID.SelectedValue.ToString();
                fillData(a);
            }
        }

If Any Problem Than Ask Again

Posted 9-Feb-12 23:25pm

Aniket Yadav

Comments

Ank_ush 11-Feb-12 11:18am

When I run the project, the actual value is not passed to textbox, Value passed is System.Dataview.something.

Aniket Yadav 11-Feb-12 23:50pm

private void cmbEmp_ID_SelectedIndexChanged(object sender, EventArgs e)
{
if(cmbEmp_ID.SelectedIndex != -1) //Check For This First
{
string a = cmbEmp_ID.SelectedText.ToString(); // Try This
fillData(a);
}
}