Object reference not set to an instance of an object.

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I am loading data from database. This error is shown for line

DropDownList1.SelectedItem.Text = dtt.Rows[0]["Country"].ToString();

C#

protected void Page_Load(object sender, EventArgs e)
       {

               loadprofiledata1();

       }
       protected void loadprofiledata1()
       {
           SqlConnection con = new SqlConnection("Data Source=jayraj-pc\\sqlexpress;Initial Catalog=Internship;Integrated Security=True;Pooling=False");

           con.Open();
           SqlCommand cmd3 = new SqlCommand("select * from Users where UserID=" + Convert.ToInt16(Session["UserID"].ToString()), con);

           SqlDataAdapter daa = new SqlDataAdapter(cmd3);
           DataTable dtt = new DataTable();
           daa.Fill(dtt);
           if (dtt.Rows.Count > 0)
           {
               firstname.Text = dtt.Rows[0]["FirstName"].ToString();
               lastname.Text = dtt.Rows[0]["LastName"].ToString();
               username.Text = dtt.Rows[0]["UserName"].ToString();
               gender.SelectedItem.Text = dtt.Rows[0]["Gender"].ToString();
               email.Text = dtt.Rows[0]["EmailAddress"].ToString();
               dob.Text = dtt.Rows[0]["DOB"].ToString();
               mobile.Text = dtt.Rows[0]["MobileNo"].ToString();
               nationality.Text = dtt.Rows[0]["Nationality"].ToString();
               address.Text = dtt.Rows[0]["Address"].ToString();
               DropDownList1.SelectedItem.Text = dtt.Rows[0]["Country"].ToString();
               DropDownList2.SelectedItem.Text = dtt.Rows[0]["State"].ToString();
               DropDownList3.SelectedItem.Text = dtt.Rows[0]["City"].ToString();
               collegename.Text = dtt.Rows[0]["College"].ToString();
               degree.SelectedItem.Text = dtt.Rows[0]["Degree"].ToString();
               seconddegree.SelectedItem.Text = dtt.Rows[0]["SecondDegree"].ToString();
               branch1.SelectedItem.Text = dtt.Rows[0]["Branch"].ToString();
               startyear.SelectedItem.Text = dtt.Rows[0]["StartYear"].ToString();
               endyear.SelectedItem.Text = dtt.Rows[0]["ExpectedPassOutYear"].ToString();








           }
       }

Posted 4-May-14 20:23pm

jayraj86

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Comments

Thanks7872 5-May-14 2:26am

See this: Object reference not set to an instance of an object
Its a well explained answer to this error.

Sivaraman Dhamodharan 5-May-14 2:43am

Check the spelling for Country in the database. I mean check that the column name is right.
dtt: is valid
Rows[0] also valid.
Only suspect is misspelled column name

2 solutions

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ravikhoda · Answer 1 · 2014-05-04T20:58:00

Solution 1

well check if dropdown1 has any selecteditem or not,

C#

if(dropdown1.selecteditem!=null)
{
dropdown1.selecteditem.text = dtt.Rows[0]["Country"].ToString();
}

but i would suggest you to write

C#

dropdown1.selectedvalue = dtt.Rows[0]["Country"].ToString();

instead of selecteditem.text

Posted 4-May-14 20:58pm

ravikhoda

Comments

jayraj86 5-May-14 3:39am

Same thing i am loading in other page using same code and it works perfectly on other page

Kan07 · Answer 2 · 2014-05-04T21:07:00

Solution 2

this is due to null value in

dtt.Rows[0]["Country"].ToString();

check dtt ,by compile step by step ,hover the mouse in dtt and take full view of that table and check the value ["Country"]

OR check the name ["Country"] is same as in DB

Posted 4-May-14 21:07pm

Kan07

Comments

jayraj86 5-May-14 3:39am

Same thing i am loading in other page using same code and it works perfectly on other page