deleting rows in a datagridview

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I have a DGV that houses items to be place on a order. The items were entered by the user
and are not bound to any source table. I can add/change items rows in the DGV. I can delete rows
and the DGV adjusts itself accordingly.
Example: I have seven rows in the DGV the rows are numbered 1-7
I delete row 2
The row disappears. The rows are now numbered 1-6
If I attempt to delete what is now row 2 it gets an exception error
stating I can not access a deleted row.
Any ideas on how to best resolve this problem.

Posted 10-Jan-14 4:55am

myavo

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bowlturner 10-Jan-14 11:31am

My first question would be are the 'row id's being renumbered? or just the visual numbers?

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 10-Jan-14 12:36pm

Can you show the code which you trying to delete the row?
Have you rebounded the DGV after deleting the row?

Kees van Spelde 10-Jan-14 14:03pm

He said the DGV is not bound to any datasource so that is probably not the problem.
For the rest I agree with you... show use some code.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 10-Jan-14 22:55pm

Yes, correct. Thanks :)

ZurdoDev 10-Jan-14 15:39pm

Yes, you need to keep track of your rows properly.

njammy 10-Jan-14 18:21pm

I agree you need to show your code and logic.
To be a bit helpful, here's a quick example that works. It can be modified to use id's and other data to get the row to delete.
///

/// Add row
///

/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
string rowValue = textBox1.Text;
dataGridView1.Rows.Add(new object[] { rowValue });
}

///

/// Delete row
///

/// <param name="sender"></param>
/// <param name="e"></param>
private void button2_Click(object sender, EventArgs e)
{
DataGridViewRow row = dataGridView1.SelectedRows[0];
dataGridView1.Rows.Remove(row);
}

Generally though, before delete event, the data should be stored in at least a Dictionary object or a class as that can be added to a collection. This can be bound to a DGV and refreshed to get around your issue.

Dilan Shaminda 12-Jan-14 0:50am

you can do something like this.when you are selecting the row take the Index of that row.then use
dataGridView1.Rows.RemoveAt(Index);

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Rahul VB · Answer 1 · 2014-01-11T06:46:00

Hello ,

I have created a small application it contains a form with the following controls:

1)2 buttons:
-Add: Adds the data in datagridview.
-Delete: Delete data from the datagridview.

2)DataGridView:
-datagridview1

3)2 textboxes:
- textbox1: enter data into the datagridview through this textbox.
- textbox2: this specifies the index at which you want to remove the data. So enter the index at which you want to remove the data.

C#

public partial class Form1 : Form
  {
      public Form1()
      {
          InitializeComponent();
          dataGridView1.Columns.Add("col1", "data");////Initialize the columns and give it a name.
          dataGridView1.RowsRemoved += new DataGridViewRowsRemovedEventHandler(removed);///When you remove an item this event handler fires


      }

      private void add_Click(object sender, EventArgs e)
      {
          dataGridView1.Rows.Add(textBox1.Text);///fetch an item from textbox and add it to the datagridview
       }

      private void delete_Click(object sender, EventArgs e)
      {
          dataGridView1.Rows.RemoveAt(int.Parse(textBox2.Text));////Remove At the location specified in the textbox
      }

      public void removed(object sender, DataGridViewRowsRemovedEventArgs e)
      {

          MessageBox.Show("Removed  ");///pops up when you delete an item
      }

  }

- Please remember suppose you have 3 elements in the datagridview. To delete the 3 element you will have to specify the index : 2, because it is a zero based index, starts from 0 not 1. So the exception you might have got is :

Quote:
Uncommitted new row cannot be deleted.

(correct me if i am wrong).

- Just try the above code. Hope it helps. This code adds and deletes an item on button press. Please do let me know what happens.

thanks again,
-Rahul

deleting rows in a datagridview

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deleting rows in a datagridview

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