I got this error "index 0 is either negative or above rows account" while running the code below

Question

5.00/5 (1 vote)

See more:

private void txtDesc_TextChanged(object sender, EventArgs e)
       {
      SqlDataAdapter dap = new SqlDataAdapter("select partnumber from movement where     description=('"+txtDesc.Text+"')",con);
           DataSet dsp = new DataSet();
           dap.Fill(dsp, "movement");
           DataView dvp = new DataView(dsp.Tables["movement"]);
           txtPartno.Text = dvp[0]["partnumber"].ToString();
       }

Posted 20-Jan-14 3:47am

Gilbertinino

Updated 20-Jan-14 4:01am

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Vedat Ozan Oner · Answer 1 · 2014-01-20T04:17:00

Error line is (possibly):

C#

txtPartno.Text = dvp[0]["partnumber"].ToString();

Your query returns no row, therefore table has no row, therefore view has no row, therefore dvp[0] corresponds to no row. As a result, you have an exception in your hand.

But I think the actual problem is your implementation. If this event handler is for a TextBox, then whenever user presses a key, that code runs. For example, if you intend to write "a description", when you press key 'a', your query runs for description=('a') which (possibly) returns no row.

Some advices:
1- design multitier application (design a separate class for data management)
2- enclose your UI handling codes in a 'try catch' structure to avoid 'unhandled exception' and a total crash.
3- use the debugger to trace your code.

Karthik_Mahalingam · Answer 2 · 2014-01-20T06:14:00

Solution 2

Add this line

C#

  if(dvp.Count > 0)
txtPartno.Text = dvp[0]["partnumber"].ToString();

or

C#

DataTable dt = new DataTable();
           dap.Fill(dt);
           if(dt.Rows.Count > 0)
           txtPartno.Text = dt.Rows[0]["partnumber"].ToString();

Posted 20-Jan-14 6:14am

Karthik_Mahalingam