Index was out of range. Must be non-negative and less than the size of the collection.

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ID = Convert.ToInt32(dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString());
TitalcomboBox.Text = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
NametxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();
HPtxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
//CPtxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();
//WPtxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[5].Value.ToString();
//AddrstxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[6].Value.ToString();
//CitytxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[7].Value.ToString();
//StatecomboBox.Text = dataGridView1.Rows[e.RowIndex].Cells[8].Value.ToString();
//PintxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[9].Value.ToString();
//PEmailtxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[10].Value.ToString();
//WEmailtxtBox.Text = dataGridView1.Rows[e.RowIndex].Cells[11].Value.ToString();
//GendrcomboBox.Text = dataGridView1.Rows[e.RowIndex].Cells[12].Value.ToString();
//dateTimePicker1.Text = dataGridView1.Rows[e.RowIndex].Cells[13].Value.ToString();
//dateTimePicker2.Text = dataGridView1.Rows[e.RowIndex].Cells[14].Value.ToString();

What I have tried:

Index was out of range. Must be non-negative and less than the size of the collection.

Posted 17-Jan-17 21:34pm

Jitendra shekhawat

Updated 17-Jan-17 22:39pm

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Comments

Kornfeld Eliyahu Peter 18-Jan-17 3:45am

On which line?

2 solutions

Solution 2

Use the debugger to see what your code is doing. It allow you to execute lines 1 by 1 and to inspect variables as it execute.
When error occurs, you will be able to inspect the array, its size and value of the index you use to access it.

Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to.

Posted 17-Jan-17 22:34pm

Patrice T

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CPallini · Accepted Answer · 2017-01-17T21:46:00

Solution 1

Well, the error message is clear: you are trying to access a not existing array item.
For instance, if the error occurs in

Quote:
dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();

then the Cells array probably has just 3 items (just 0,1,2 are valid indices).

Posted 17-Jan-17 21:46pm

CPallini

Comments

Jitendra shekhawat 18-Jan-17 4:48am

what to do ....?/
slove this problems

CPallini 18-Jan-17 4:57am

Find the offending line (use the debugger or simply read carefully the whole error message) and then try to understand why the expected item is missing.

Jitendra shekhawat 18-Jan-17 5:09am

i understand problem...
but how to slove this....;(

Jitendra shekhawat 18-Jan-17 5:10am

https://www.codeproject.com/Questions/1166191/Index-was-out-of-range-Must-be-non-negative-and-le?tab=mostrecent

Complete code this link