主要是应用DataGridView的EditingControlShowing事件。当单元格进入编辑模式时，可以处理执行该编辑控件的自定义初始化的此事件。
public DataGridViewTextBoxEditingControl dgvTxt = null; // 声明 一个 CellEdit
private void dgv2_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
dgvTxt = (DataGridViewTextBoxEditingControl)e.Control; // 赋值
dgvTxt.SelectAll();
dgvTxt.KeyPress += Cells_KeyPress; // 绑定到事件
}
// 自定义事件KeyPress事件
private void Cells_KeyPress(object sender, KeyPressEventArgs e)
{
Kzjgsl.keyPressXS(e, dgvTxt);
}
public static void keyPressXS(KeyPressEventArgs e, DataGridViewTextBoxEditingControl dgvTxt)
{
if (char.IsNumber(e.KeyChar) || e.KeyChar == '.' || e.KeyChar == (char)Keys.Back)
{
e.Handled = false; //让操作生效
int j = 0;
int k = 0;
bool flag = false;
if (dgvTxt.Text.Length == 0)
{
if (e.KeyChar == '.')
{
e.Handled = true; //让操作失效
}
}
for (int i = 0; i < dgvTxt.Text.Length; i++)
{
if (dgvTxt.Text[i] == '.')
{
j++;
flag = true;
}
if (flag)
{
if (char.IsNumber(dgvTxt.Text[i]) && e.KeyChar != (char)Keys.Back)
{
k++;
}
}
if (j >= 1)
{
if (e.KeyChar == '.')
{
e.Handled = true; //让操作失效
}
}
if (k == 2)
{
if (char.IsNumber(dgvTxt.Text[i]) && e.KeyChar != (char)Keys.Back)
{
if (dgvTxt.Text.Length - dgvTxt.SelectionStart < 3)
{
if (dgvTxt.SelectedText != dgvTxt.Text)
{
e.Handled = true; ////让操作失效
}
}
}
}
}
}
else
{
e.Handled = true;
}
}