c#限制输入数字和小数点

C#中限制dataGridView单元格内容只能输入数字并且只能输入一个小数点：

private void dataGridViewEx1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)

{

if (this.dataGridViewEx1.CurrentCell.ColumnIndex == this.dataGridViewEx1.Columns[this.ColEstimatePrice.Index].Index || this.dataGridViewEx1.CurrentCell.ColumnIndex == this.dataGridViewEx1.Columns[this.ColPlannedWare.Index].Index || this.dataGridViewEx1.CurrentCell.ColumnIndex == this.dataGridViewEx1.Columns[this.ColPlanShipmentQty.Index].Index)

{

e.Control.KeyPress += new KeyPressEventHandler(TextBox_KeyPress);

}

else

{

e.Control.KeyPress -= new KeyPressEventHandler(TextBox_KeyPress);

}

}

private void TextBox_KeyPress(object sender, KeyPressEventArgs e)

{

//输入为小数点时，只能输入一次且只能输入一次

DataGridViewTextBoxEditingControl textBox = sender as DataGridViewTextBoxEditingControl;

if (e.KeyChar == '.' && (textBox.Text.Length == 0 || textBox.SelectionLength == textBox.Text.Length))

{

e.Handled = true;

}

if (e.KeyChar != 8 && !Char.IsDigit(e.KeyChar) && e.KeyChar != '.')

{

e.Handled = true;

}

if (e.KeyChar == '.' && ((TextBox)sender).Text.IndexOf(".") >= 0)

{

e.Handled = true;

}

}