求助一个NumericUpDown的问题

yang1216 2013-09-03 08:16:18

我想在一个datagridview里面为每一条记录嵌入不同的编辑器，例如NumericUpDown，Combobox等等，差不多完成了。
但是遇到一个问题，我发现在NumericUpDown直接输入数值时只要输入0就会触发ValueChanged 事件，例如输入20就相当于2+enter。我试验了一下，如果NumericUpDown不在DataGridView里面，输入0不会触发ValueChanged 事件。
这到底是咋回事呀？
附上代码



//初始化表格

        private void init()

        {

            SplashScreen.BeginDisplay();            

            myDgvNoAdjInPara.AutoGenerateColumns = false;

            myDgvNoAdjInPara.Controls.Add(paraNumericUpDown);

            myDgvNoAdjInPara.Controls.Add(paraComboBox);

            myDgvNoAdjInPara.Controls.Add(paraRadioButton);

            paraControl.Visible = false;

            paraNumericUpDown.Visible = false;

            paraComboBox.Visible = false;

            paraRadioButton.Visible = false;

            paraNumericUpDown.ValueChanged += frmTestItem_ValueChanged;

            paraComboBox.SelectedIndexChanged += frmTestItem_SelectedIndexChanged;

            paraRadioButton.CheckedChanged += frmTestItem_CheckedChanged;          

        }

//点击一个单元格，显示不同的编辑器

private void myDgvNoAdjInPara_CellClick(object sender, DataGridViewCellEventArgs e)

        {

            DataGridView dgv = sender as DataGridView;

            if (e.RowIndex < 0) return;

            if (dgv.Rows[e.RowIndex].Cells["colId"].Value == null) return;

            paraControl.Visible = false;

            int id = Convert.ToInt32(dgv.Rows[e.RowIndex].Cells["colId"].Value);

            Rectangle rect;

            if (dgv.Columns[e.ColumnIndex].HeaderText == "参数值")

            {

                var itemPara = TestItemEquipIOParaService.SelectById(id);

                if (itemPara == null || itemPara.ParaCode == null) return;

                var equipPara = EquipParaService.SelectByCode(itemPara.ParaCode);

                if (equipPara == null || equipPara.ParaValueType == null) return;

                getParaControl((int)equipPara.ParaValueType, equipPara.RefValue, dgv.CurrentCell.Value.ToString());

                //get the rectangle of the current cell in the datagridview 

                rect =

                    dgv.GetCellDisplayRectangle(dgv.CurrentCell.ColumnIndex, dgv.CurrentCell.RowIndex, false);

                //show the control in the rectangle                

                paraControl.Top = rect.Top;

                paraControl.Left = rect.Left;

                paraControl.Height = rect.Height;

                paraControl.Width = rect.Width;

                paraControl.Visible = true;

            }

        }

//获得不同的编辑器

private void getParaControl(int paraVauleType,string refValue,string currentValue)

        {

            paraControl = new Control();

            switch (paraVauleType)

            {

                case 0:                    

                    decimal inc;

                    decimal value;

                    try

                    {

                        if (string.IsNullOrEmpty(refValue)) inc = 1;

                        else inc = Convert.ToDecimal(refValue);

                        if (string.IsNullOrEmpty(currentValue)) value = 0;

                        else value = Convert.ToDecimal(currentValue);

                        paraNumericUpDown.Increment = inc;

                        paraNumericUpDown.Value = value;                        

                    }

                    catch (Exception ex)

                    {

                        log.Debug(String.Format("{0}\t{1}", ex.Source, ex.Message));

                        return;

                    }    

                    paraControl = paraNumericUpDown;

                    if (paraNumericUpDown.Value!=null)

                        paraControl.Text = paraNumericUpDown.Value.ToString();

                    break;                   

                default:

                    break;

            }            

        }

//NumericUpDown值变化事件函数

private void frmTestItem_ValueChanged(object sender, EventArgs e)

        {

            if (paraControl is NumericUpDown)

                myDgvNoAdjInPara.CurrentCell.Value = ((NumericUpDown)paraControl).Value;

        }