C# DataGridView的單元格中只能輸入數字

控件類型：DataGridView

控件名稱：dgvGift_Condition

裏面用到的：IsNumeric、NotePastText、RestoreText 等請參見 前一日志“TextBox中只能輸入數字”。

下面例子中 dgvGift_Condition中 第2列和第4列 只能輸入數字

private DataGridViewTextBoxEditingControl EditingControl = new DataGridViewTextBoxEditingControl();

private void dgvGift_Condition_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if (this.dgvGift_Condition.CurrentCell.ColumnIndex == 1 || this.dgvGift_Condition.CurrentCell.ColumnIndex == 3)
            {
                EditingControl = (DataGridViewTextBoxEditingControl)(e.Control);
                EditingControl.KeyPress += new KeyPressEventHandler(EditingControl_KeyPress);
                EditingControl.TextChanged += new EventHandler(EditingControl_TextChanged);
            }
        }

void EditingControl_TextChanged(object sender, EventArgs e)
        {
            if (this.IsNumeric(this.EditingControl.Text, true, false))
            {
                this.NotePastText(this.EditingControl, ref PastText);
            }
            else
            {
                this.RestoreText(this.EditingControl, PastText);
            }
        }

void EditingControl_KeyPress(object sender, KeyPressEventArgs e)
        {
            this.CheckKeyIn(e, false);
        }

private void dgvGift_Condition_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
        {
            if (e.ColumnIndex == 1 || e.ColumnIndex == 3)
            {
                TextBox tb = new TextBox();
                if (this.dgvGift_Condition.Rows[e.RowIndex].Cells[e.ColumnIndex].Value == null)
                {
                    tb.Text = "";
                }
                else
                {
                    tb.Text = this.dgvGift_Condition.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
                }
                this.NotePastText(tb, ref PastText);
            }
        }

private void dgvGift_Condition_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            EditingControl.KeyPress -= EditingControl_KeyPress;
            EditingControl.TextChanged -= EditingControl_TextChanged;
        }