Datagridview add Checkbox on some cell using <DataGridViewCheckBoxColumn>, not a column

Question

I have a DataGirdView that is bound to a List.

I would like to add CheckBox on some cell by DataGridViewCheckBoxCell, but that is no controllers display on my datagridview. Below is my code:

class ColumnNames
{
    public string Check { get; set; }
    public string Index { get; set; }
    public string SubIndex { get; set; }
    public string Name { get; set; }
    public string Value { get; set; }

    public ColumnNames(
        string Check,
        string Index,
        string SubIndex,
        string Name,
        string Value
        )
    {
        this.Check = Check;
        this.Index = Index;
        this.SubIndex = SubIndex;
        this.Name = Name;
        this.Value = Value;
    }
}

itemsList.Add(new ColumnNames(Check, Index, SubIndex, Name, DataType));
datagridview.DataSource = itemsList;
datagridview.Rows[0].ReadOnly = true;
datagridview.Rows[0].Cells[0] = new DataGridViewCheckBoxCell();
datagridview.Rows[0].Cells[0].Value = false;

when I run this code, I only get the string 'false' on cell[0]. I had monitor this cell using break point, this cell is "Datagirdviewcheckboxcell" , but no checkbox controller on this. How can I solve this problem? Thanks!

because you set your column property readonly, try removing datagridview.Rows[0].ReadOnly = true; line — kgzdev
– kgzdev, Commented Jun 12, 2017 at 5:59
I could be wrong, but I believe the checkbox will only operate properly against a boolean property. Do you have control over the class? Can you add a property like public bool CheckBool { get { return bool.Parse(this.Check); } set { this.Check = value.ToString(); } } and then bind to that instead? — Adam Plocher
– Adam Plocher, Commented Jun 12, 2017 at 6:17

S_D · Accepted Answer · 2017-06-12 08:23:23Z

1

I think you set in this line new ColumnNames(Check, Index, SubIndex, Name, DataType) Check as "string" with value "false".

Change ColumnNames to:

 ...
 public bool Check { get; set; }
 ...
   public ColumnNames(bool Check, ...)
   {
        this.Check = Check;
        ...
   }
 ...

Then just:

        List<ColumnNames> itemsList = new List<ColumnNames>();
        itemsList.Add(new ColumnNames(true,"Index", "SubIndex", "Name", "DataType"));
        dataGridView1.DataSource = itemsList;

Results in:

No need for: datagridview.Rows[0].Cells[0] = new DataGridViewCheckBoxCell();

In case you need different types of cells in one column you will have to go with custom DataGridViewColumn.

According to this answer: creating a custom column type? You have available two tutorials:

Then just stick with object type of Check property in your class and in your custom implementation paint cell based on value type.

Something like:

switch(Check.GetType()){
      case typeof(Boolean): /* draw CheckBox */ break;
      default: /* draw string */ break; //you can keep string in default with all other types.
}

edited Jun 12, 2017 at 8:23

answered Jun 12, 2017 at 6:11

S_D

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2 Comments

sarah Over a year ago

But when I use this class public bool Check { get; set; }. I will got a column checkbox. But I only like to have one or 2 rows have checkbox, the others not.

S_D Over a year ago

Check out my update. Sorry do not have time to write you here so complex solution like that ;)

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