CODEWITHSUNDEEP
c#winformsdatagridview
MapMan
MapMan

Reputation: 668

Restrict number of characters in DataGridViewCell

I have a DataGridView, that is created dyanically. It contains 2 columns. The first being the header and the second column is the one that allows user input. The 2nd column is a mixture of DataGridViewCells and DataGridViewComboBoxCell. Each row has a limit on the number of characters that are allowed within the DataGridViewCell.

What i would like to do is on KeyPress for that cell limit the number of characters that can be entered and popup a message if the length is greater than the limit. Does anyone have any example code for this.

I am using c#, Visual Studio 2010

Upvotes: 1

Views: 3192

Answers (2)

Alexander Petrov
Alexander Petrov

Reputation: 14231

If you have a column type of DataGridViewTextBoxColumn, you can simply set the property MaxInputLength that would limit the length of the input text.

var column2 = new DataGridViewTextBoxColumn();
column2.MaxInputLength = 5;
dataGridView.Columns.Add(column2);

To manually add code for the KeyPress event handler try the following:

TextBox columnTextBox; // Form field

private void DataGridView_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    if (columnTextBox != null)
        columnTextBox.KeyPress -= TextBox_KeyPress;
}

private void DataGridView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
    columnTextBox = e.Control as TextBox;

    if (columnTextBox != null)
        columnTextBox.KeyPress += TextBox_KeyPress;
}

private void TextBox_KeyPress(object sender, KeyPressEventArgs e)
{
    var textBox = (TextBox)sender;
    // here your logic with textBox
}

Set event handlers for DataGridView:

dataGridView.EditingControlShowing += DataGridView_EditingControlShowing;
dataGridView.CellEndEdit += DataGridView_CellEndEdit;

Upvotes: 2

P.Haldemann
P.Haldemann

Reputation: 36

You can build your own DatagridViewColumn Class i think. Take a look at this: http://msdn.microsoft.com/en-us/library/ms180996.aspx

Upvotes: 0

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