做网站 需要工信部备案吗,杭州建设教育网站,怎么制作一个游戏app,导购网站模板免费下载目的#xff1a; 扩展 C# WinForm 自带的表格控件#xff0c;使其可以自动判断数据的上下界限值#xff0c;并标识溢出。 这里使用的方法是#xff1a;扩展 表格的列 对象#xff1a;DataGridViewColumn。 1.创建类#xff1a;DataGridViewDecimalCheckCell.cs public cl…目的 扩展 C# WinForm 自带的表格控件使其可以自动判断数据的上下界限值并标识溢出。 这里使用的方法是扩展 表格的列 对象DataGridViewColumn。 1.创建类DataGridViewDecimalCheckCell.cs public class DataGridViewDecimalCheckCell : DataGridViewTextBoxCell{private bool checkMaxValue false;private bool checkMinValue false;private decimal maxValue 0;private decimal minValue 0;public decimal MaxValue{get { return maxValue; }internal set { maxValue value; }}public decimal MinValue{get { return minValue; }internal set { minValue value; }}public bool CheckMaxValue{get { return checkMaxValue; }internal set { checkMaxValue value; }}public bool CheckMinValue{get { return checkMinValue; }internal set{checkMinValue value;}}public override object Clone(){DataGridViewDecimalCheckCell c base.Clone() as DataGridViewDecimalCheckCell;c.checkMaxValue this.checkMaxValue;c.checkMinValue this.checkMinValue;c.maxValue this.maxValue;c.minValue this.minValue;return c;}protected override void Paint(Graphics graphics, Rectangle clipBounds,Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState,object value, object formattedValue, string errorText,DataGridViewCellStyle cellStyle,DataGridViewAdvancedBorderStyle advancedBorderStyle,DataGridViewPaintParts paintParts){// Paint the base contentbase.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState,value, formattedValue, errorText, cellStyle,advancedBorderStyle, paintParts);// 上下界限溢出判断if (rowIndex 0 || this.OwningRow.IsNewRow) // 行序号不为-1且不是新记录行return;if (value null) return;if (value.GetType() typeof(DBNull)) return;decimal vCurValue Convert.ToDecimal(value);bool overValue false;Image img null;if (checkMaxValue){overValue vCurValue maxValue;img VsTest.Properties.Resources.Undo;}if (checkMinValue !overValue){overValue vCurValue minValue;img VsTest.Properties.Resources.Redo;}// 将图片绘制在 数值文本后面if (overValue img ! null){var vSize graphics.MeasureString(vCurValue.ToString(), cellStyle.Font);System.Drawing.Drawing2D.GraphicsContainer container graphics.BeginContainer();graphics.SetClip(cellBounds);graphics.DrawImageUnscaled(img, new Point(cellBounds.Location.X (int)vSize.Width, cellBounds.Location.Y));graphics.EndContainer(container);}}protected override bool SetValue(int rowIndex, object value){if (rowIndex 0){try{decimal vdeci Convert.ToDecimal(value); // 筛选非数字base.ErrorText string.Empty;}catch (Exception ex){base.ErrorText 输入错误 ex.Message;return false;}}return base.SetValue(rowIndex, value);}} 2.创建类DataGridViewDecimalCheckColumn.cs public class DataGridViewDecimalCheckColumn : DataGridViewColumn{private bool checkMaxValue false;private bool checkMinValue false;private decimal maxValue 0;private decimal minValue 0;public decimal MaxValue{get { return maxValue; }set{maxValue value;(base.CellTemplate as DataGridViewDecimalCheckCell).MaxValue value;}}public decimal MinValue{get { return minValue; }set{minValue value;(base.CellTemplate as DataGridViewDecimalCheckCell).MinValue value;}}/// summary/// 是否对值上界限进行检查与MaxValue配合使用/// /summarypublic bool CheckMaxValue{get { return checkMaxValue; }set{checkMaxValue value;(base.CellTemplate as DataGridViewDecimalCheckCell).CheckMaxValue value;}}/// summary/// 是否对值下界限进行检查与MinValue配合使用/// /summarypublic bool CheckMinValue{get { return checkMinValue; }set{checkMinValue value;(base.CellTemplate as DataGridViewDecimalCheckCell).CheckMinValue value;}}public DataGridViewDecimalCheckColumn(): base(new DataGridViewDecimalCheckCell()){}public override object Clone(){DataGridViewDecimalCheckColumn c base.Clone() as DataGridViewDecimalCheckColumn;c.checkMaxValue this.checkMaxValue;c.checkMinValue this.checkMinValue;c.maxValue this.maxValue;c.minValue this.minValue;return c;}} 3.现在就可以使用了在窗体上拖一个 dataGridView 控件添加如下代码 private void TestForm_Load(object sender, EventArgs e){InitControlsProperties(); // 初始化// 绑定数据DataTable dTabel new DataTable();dTabel.Columns.Add(ID,typeof(int));dTabel.Columns.Add(TestValue,typeof(decimal));Random rnd new Random();for (int i 0; i 10; i) // 随机10个数{var vdr dTabel.NewRow();vdr[0] i 1;vdr[1] rnd.Next(50);dTabel.Rows.Add(vdr);}this.dataGridView1.DataSource dTabel;}private void InitControlsProperties(){var vColumnID new DataGridViewDecimalCheckColumn();vColumnID.DataPropertyName ID;vColumnID.DefaultCellStyle.Alignment DataGridViewContentAlignment.MiddleLeft;vColumnID.Name ID;vColumnID.HeaderText 序号;vColumnID.Width 50;this.dataGridView1.Columns.Add(vColumnID);var vColumnValue new DataGridViewDecimalCheckColumn();vColumnValue.DataPropertyName TestValue;vColumnValue.DefaultCellStyle.Alignment DataGridViewContentAlignment.MiddleLeft;vColumnValue.Name TestValue;vColumnValue.HeaderText 测试数据;vColumnValue.Width 100;vColumnValue.CheckMaxValue true; // 进行最大值检查vColumnValue.MaxValue 41;vColumnValue.CheckMinValue true; // 进行最小值检查vColumnValue.MinValue 7;this.dataGridView1.Columns.Add(vColumnValue);//this.dataGridView1.AllowUserToAddRows false;//this.dataGridView1.AllowUserToDeleteRows false;//this.dataGridView1.ReadOnly true;this.dataGridView1.AutoGenerateColumns false;} 效果图 [http://www.cnblogs.com/CUIT-DX037/] 转载于:https://www.cnblogs.com/CUIT-DX037/p/7354057.html
