c# Datagrid retain Cell focus after refresh

Question

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Hi,

I am looking for a way to retain the cell selection on the DataGridView after I refresh the data set.

This is the code I am playing with is:

C#

 int cell1 = (this.agentsDataGridView.CurrentCell.RowIndex);
 int cell2 = (this.agentsDataGridView.CurrentCell.ColumnIndex);


this.agentsTableAdapter.Fill(assistReportsDataSet.Agents);
this.agentsDataGridView.CurrentCell = this.agentsDataGridView[cell1, cell2];

I get the cell location before I populate the DataGridView and then I set the location after with the two integers.

The problem is that I get the following error when I click a cell value of more than (8,8)

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

and I can see the cell selection is constantly jumping so I obviously cannot use this method to retain cell selection.

Posted 23-Jan-11 7:35am

skatebkp

Updated 23-Jan-11 8:13am

Henry Minute

v2

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2 solutions

Solution 2

private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
int row = e.RowIndex;
int col = e.ColumnIndex;
if (row < 0 || col != 3)
return;
if (e.FormattedValue.ToString().Equals(String.Empty))
{
}
else
{
double quantity = 0;
try
{
quantity = Convert.ToDouble(e.FormattedValue.ToString());
if (quantity == 0)
{
MessageBox.Show("The quantity can not be Zero", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
e.Cancel = true;
return;
}
}
catch
{
MessageBox.Show("The quantity should be decimal value.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
e.Cancel = true;
return;
}
}
}

Posted 4-Sep-13 19:57pm

Member 8080214

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Henry Minute · Accepted Answer · 2011-01-23T09:52:00

You'll laugh when I point out the problem.

Here is the modified code (I have changed a couple of your variable names to make it clearer):

C#

int row1 = (this.agentsDataGridView.CurrentCell.RowIndex);
int col1 = (this.agentsDataGridView.CurrentCell.ColumnIndex);

this.agentsTableAdapter.Fill(assistReportsDataSet.Agents);
this.agentsDataGridView.CurrentCell = this.agentsDataGridView[col1, row1];

Did you spot the change?

The CurrentCell property expects the column first, then the row. :-D

Daft ain't it?

[Edit]
After your comment:

You might want to look at the DataGridView.SelectedCells[^] property.
You can iterate over that collection, reselecting them as you go:

C#

DataGridViewSelectedCellCollection selCells = myDGV.SelectedCells;
RefreshData();
foreach (DataGridViewCell cell in selCells)
{
  myDGV.Rows[cell.RowIndex].Cells[cell.ColumnIndex].Selected = true;
}

I have typed that in without benefit of Visual Studio, so please forgive any syntax errors, but it should give you the idea.

Good luck! :)
[/Edit]