Develop Reference

Winforms DatagridView Get clicked Cell Value only from 1-st Column

I can get the value of a clicked datagridView cell like this:
private void dgvCountryHits_CellClick(object sender, DataGridViewCellEventArgs e)
{
var cell = dgvCountryHits.CurrentCell;
MessageBox.Show(string.Format("{0}", cell.Value));
}
How do i allow clicking ONLY on Column[0]?
Ignoring clicks on the rest of the columns.

If you know which column it is you can use e.ColumnIndex == 1.
See this link: DataGridViewCellEventArgs

how to remove or disable the extra column and row selection function?

I have grid view, and I have already disable the column auto width so I can manually set the size of column. after manually resize there's a extra blank column. and what I want is :
To disable the select row function when i click on outside of the column in Active, code and generate
Remove the extra column.
I already success fully hide the remaining column with this event or code
private void gridView1_CustomDrawColumnHeader(object sender, ColumnHeaderCustomDrawEventArgs e)
{
if (e.Column == null)
{
e.Handled = true;
}
}
The thing is I still can click on the outside of the genre, and the row selection still follow where I click

Handle the GridView.MouseDown event in the following way:
private void gridView1_MouseDown(object sender, MouseEventArgs e) {
GridView view = (GridView)sender;
var hi = view.CalcHitInfo(e.Location);
Console.WriteLine(hi.HitTest);
if (hi.InRow && !hi.InRowCell)
DXMouseEventArgs.GetMouseArgs(e).Handled = true;
}

How to transfer data from gridview to textbox

Suppose if I say I have selected a row in gridview and want that row to come up in to their respective textboxes. For example, I have selected a row which has First Name and Last Names and on selection of row, the data from gridview should come in to textbox on winform. Please tell me.
I am guess it is something based on selection changed event if I am right ? Like below:
private void dgv_SelectionChanged(object sender, EventArgs e)
{
string str = txtFirstName.Text;
DataGridViewRow selectedRow;
}

If I got your question right, your solution is to use DataGridView.SelectedRows Property along with DataGridView.SelectionChanged Event
DataGridView.SelectedRows Gets the collection of rows selected by the
user.
DataGridView.SelectionChanged occurs whenever cells are selected or
the selection is canceled, whether programmatically or by user action.
private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count > 0)
{
foreach (DataGridViewRow row in dataGridView1.SelectedRows) {
//Send the first cell value into textbox'
Txt_FirstName.Text = row.Cells(0).Value.ToString; // or row.Cells["ColumnName"].Value;
}
}
}
MSDN and MSDN

How to determine which row is clicked in GridView using c#

I have a GridView1 in my form which populate a table from my Database.
The columns in my table are
ID NAME EMAIL ADDS
Now I want a user to click on ID Row and show a message in a label which row is clicked by a user. How can I do this? I've been googling for a long time.

You can find out the clicked row/column in the DataGridView.CellClick Event Handler.
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
// e.RowIndex
// e.ColumnIndex
}

cancel gridview row edit mode programatically using C#

I am using a Editable GridView. On clicking edit button of a row, the row is coming in Editable mode and once I update the details of a current row, the row is getting saved and comes in normal mode.
Here I face one issue. When I make row to a Editable mode, On click of a button (which is not a part of grid) I want to bring Editable row mode to a normal mode.

Change the gridview's EditIndex value to -1.
protected void Button1_Click(object sender, EventArgs e)
{
GridView1.EditIndex = -1;
}

You can put this in your "RowCancelingEdit" event
My Gridview name is grdViewDetails.
protected void grdViewDetails_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
grdViewDetails.EditIndex = -1;
grdViewDetails.DataSource = YourDatasource; //a dataset in my case
//Bind data to the GridView control.
grdViewDetails.DataBind();
}