Got this error while selecting a combobox "Index 0 is either negative or above rows count."

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private void comboPrtn_SelectionChangeCommitted(object sender, EventArgs e)
       {




           ////---------------------------Show price-------------------

               SqlDataAdapter ddamtp = new SqlDataAdapter("select * from assign_price('" + this.comboPrtn.SelectedValue + "')", con);
               DataSet ddsamtp = new DataSet();
               ddamtp.Fill(ddsamtp, "price");
               DataView vddamtp = new DataView(ddsamtp.Tables["price"]);
               txtUprice.Text = vddamtp[0]["PRICE"].ToString();

           ////----------------------------end-------------------------
       }

Posted 13-Jan-14 23:30pm

Gilbertinino

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2 solutions

Solution 2

Since, as far as I know 0 is not negative, and it can't be either above the rows count, such message is plain wrong.
--Carlo The NitPick

However your code is wrong too (the index is equal to row count):

txtUprice.Text = vddamtp[0]["PRICE"].ToString();

You are accessing vddamtp[0] without being sure such dataview contains, at least, one row.

Posted 13-Jan-14 23:40pm

CPallini

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OriginalGriff · Accepted Answer · 2014-01-13T23:39:00

Solution 1

Assuming assign_price is a function you created, you need to be sure it returns some values. If it doesn't, then the the line:

C#

txtUprice.Text = vddamtp[0]["PRICE"].ToString();

will give the exception you refer to.

Posted 13-Jan-14 23:39pm

OriginalGriff