Numeric only text box in .net Winforms

We can create Numeric only text boxes in .Net Windows forms application with adding below code in Key Press Event.

Numeric only text boxes

private void txtBox_KeyPress(object sender, KeyPressEventArgs e)

{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) && e.KeyChar != ‘.’)
{
e.Handled = true;
}

// only allow one decimal point
if (e.KeyChar == ‘.’ && (sender as TextBox).Text.IndexOf(‘.’) > -1)
{
e.Handled = true;
}
}

 

Integer only text boxes

private void txtBox_KeyPress(object sender, KeyPressEventArgs e)

{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) )
{
e.Handled = true;
}

}

Confirm Dialog in .Net WinForms

We can use MessageBox as Confirm Dialog box

Coding

if(MessageBox.Show(“Confirm this?”, “Test”, MessageBoxButtons.YesNo) == DialogResult.Yes)
{
/// Code for ‘Yes’
}
else
{
/// Code for ‘No’
}

AutoGenerateColumn property – Winforms

In datagridview properties can not find AutoGenerateColumn property, but can find pragmatically.

Here can set false to hide columns, need to do before set the datasource.

Datagridview1.AutoGenerateColumn = false;  Datagridview1.DataSource = dt;

Non-Editable ComboBox

For non-Editable comboBox Set DropDownStyle as DropDownList.

Coding
ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList;