Question

I’m creating a simple DataGridView with a check box column and a text column (more columns will follow, but this is the minimal working example that I’m trying to get working). When I run this code, the checkbox columns appears, but I can’t check the boxes.

DataGridViewCheckBoxColumn checkColumn = new DataGridViewCheckBoxColumn();
checkColumn.ThreeState = false;
checkColumn.Width = 20;

MyDataGridView.Columns.Add(checkColumn);
MyDataGridView.Columns.Add(new DataGridViewTextBoxColumn());

Since nothing appears in this case, I thought to add some dummy data.

for (int i = 0; i < 10; i++)
{
    MyDataGridView.Rows.Add(new Object[] { true, "test"});
}

Normally, the DataGridView is populated with data bound from a list of custom objects, like in this question of mine, but I thought it would be better to get this working in a basic way before moving on.

I’m not trying to set the checked state programmatically, but rather let the user select and then use that selection in various other event handlers.

Answer 1

The code seems to be fine, so I just can tell you to check and ensure that the following DataGridView properties are properly set: ReadOnly set to False and Enabled set to True.