C# Datagridview Checkbox Checked Event – multiple rows

c++checkboxcheckeddatagridview

I have a datagridview with multiple columns and rows.
The first column contains a checkbox.
I want the user to be able to select multiple checkboxes and then perform an action.
For example if they select checkboxes in rows 1 and 2, the data from other columns in rows 1 and 2 can be selected and passed into a messagebox.

I know i need to use the checkbox_changed event to do this. However I am having trouble working out how to do this for multiple rows?

Best Solution

On button Click event do:

static int SelectColumnIndex = 0;
PerformAction_Click(object sender, System.EventArgs e)
{
    string data = string.Empty;
    foreach(DataGridViewRow row in MyDataGridView.Rows)
    {
      if(row.Cells[SelectColumnIndex].Value!=null &&
             Convert.ToBoolean(row.Cells[SelectColumnIndex].Value) == true)
      {
        foreach(DataGridViewCell cell in row.Cells)
        {
          if(cell.OwningColumn.Index!= SelectColumnIndex)
          {
            data+= (cell.Value + " ") ; // do some thing
          }
        }
        data+="\n";
      }
   }
   MessageBox.Show(data, "Data");
}

Modern jQuery

Use .prop():

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);

DOM API

If you're working with just one element, you can always just access the underlying HTMLInputElement and modify its .checked property:

$('.myCheckbox')[0].checked = true;
$('.myCheckbox')[0].checked = false;

The benefit to using the .prop() and .attr() methods instead of this is that they will operate on all matched elements.

jQuery 1.5.x and below

The .prop() method is not available, so you need to use .attr().

$('.myCheckbox').attr('checked', true);
$('.myCheckbox').attr('checked', false);

Note that this is the approach used by jQuery's unit tests prior to version 1.6 and is preferable to using $('.myCheckbox').removeAttr('checked'); since the latter will, if the box was initially checked, change the behaviour of a call to .reset() on any form that contains it – a subtle but probably unwelcome behaviour change.

For more context, some incomplete discussion of the changes to the handling of the checked attribute/property in the transition from 1.5.x to 1.6 can be found in the version 1.6 release notes and the Attributes vs. Properties section of the .prop() documentation.

Best Solution

Related Solutions

C# – Catch multiple exceptions at once

Javascript – Setting “checked” for a checkbox with jQuery

Modern jQuery

DOM API

jQuery 1.5.x and below

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