在DataGrid中简单使用下拉列表框 在DataGrid中使用下拉列表问题。这篇文章讲了如何在 System.Windows.Forms.DataGrid中切入使用ComboBox控件。不过原文不全，无法调试，在这里为了说清楚点，对原文作了一些修改，整篇文章主要包括三方面的内容。1． 在DataGrid中加入ComboBox列；2． 把在DataGrid中的修改保存到对应的网格；3． 设置DataGrid中网格的焦点。下面是整个源代码，一些功能可以看注释。using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;namespace DataGridTest{ public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.DataGrid dgdFunctionArea; private DataTable dtblFunctionalArea; private System.Windows.Forms.Button buttonFocus; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); PopulateGrid(); } protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); }
#region Windows 窗体设计器生成的代码 private void InitializeComponent() { this.dgdFunctionArea = new System.Windows.Forms.DataGrid(); this.buttonFocus = new System.Windows.Forms.Button(); ((System.ComponentModel.ISupportInitialize)(this.dgdFunctionArea)).BeginInit(); this.SuspendLayout(); // // dgdFunctionArea // this.dgdFunctionArea.DataMember = ""; this.dgdFunctionArea.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dgdFunctionArea.Location = new System.Drawing.Point(4, 8); this.dgdFunctionArea.Name = "dgdFunctionArea"; this.dgdFunctionArea.Size = new System.Drawing.Size(316, 168); this.dgdFunctionArea.TabIndex = 0; // // buttonFocus // this.buttonFocus.Location = new System.Drawing.Point(232, 188); this.buttonFocus.Name = "buttonFocus"; this.buttonFocus.Size = new System.Drawing.Size(84, 23); this.buttonFocus.TabIndex = 1; this.buttonFocus.Text = "获取焦点"; this.buttonFocus.Click += new System.EventHandler(this.buttonFocus_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(332, 217); this.Controls.Add(this.buttonFocus); this.Controls.Add(this.dgdFunctionArea); this.Name = "Form1"; this.Text = "Form1"; ((System.ComponentModel.ISupportInitialize)(this.dgdFunctionArea)).EndInit(); this.ResumeLayout(false); } #endregion /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } //初始化DataGrid private void PopulateGrid() { //创建一个DataTable对象，包括四列，前三列为String，最后一列为Boolean。 dtblFunctionalArea = new DataTable ("FunctionArea"); string[] arrstrFunctionalArea = new string [3]{"Functional Area","Min","Max"}; DataColumn dtCol = null; //创建String列 for(int i=0; i< 3;i++) { dtCol = new DataColumn(arrstrFunctionalArea[i]); dtCol.DataType = Type.GetType("System.String"); dtCol.DefaultValue = ""; dtblFunctionalArea.Columns.Add(dtCol); } //创建Boolean列，用CheckedBox来显示。 DataColumn dtcCheck = new DataColumn("IsMandatory"); dtcCheck.DataType = System.Type.GetType("System.Boolean"); dtcCheck.DefaultValue = false; dtblFunctionalArea.Columns.Add(dtcCheck); //把表绑定到DataGrid dgdFunctionArea.DataSource = dtblFunctionalArea; //为DataGrid加载DataGridTableStyle样式 if(!dgdFunctionArea.TableStyles.Contains("FunctionArea")) { DataGridTableStyle dgdtblStyle = new DataGridTableStyle(); dgdtblStyle.MappingName = dtblFunctionalArea.TableName; dgdFunctionArea.TableStyles.Add(dgdtblStyle); dgdtblStyle.RowHeadersVisible = false; dgdtblStyle.HeaderBackColor = Color.LightSteelBlue; dgdtblStyle.AllowSorting = false; dgdtblStyle.HeaderBackColor = Color.FromArgb(8,36,107); dgdtblStyle.RowHeadersVisible = false; dgdtblStyle.HeaderForeColor = Color.White; dgdtblStyle.HeaderFont = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); dgdtblStyle.GridLineColor = Color.DarkGray; dgdtblStyle.PreferredRowHeight = 22; dgdFunctionArea.BackgroundColor = Color.White; //设置列的宽度 GridColumnStylesCollection colStyle = dgdFunctionArea.TableStyles[0].GridColumnStyles; colStyle[0].Width = 100; colStyle[1].Width = 50; colStyle[2].Width = 50; colStyle[3].Width = 80; } DataGridTextBoxColumn dgtb = (DataGridTextBoxColumn)dgdFunctionArea.TableStyles[0].GridColumnStyles[0]; ComboBox cmbFunctionArea = new ComboBox(); cmbFunctionArea.Items.AddRange(new object[]{"选项一","选项二","选项三"}); cmbFunctionArea.Cursor = Cursors.Arrow; cmbFunctionArea.DropDownStyle= ComboBoxStyle.DropDownList; cmbFunctionArea.Dock = DockStyle.Fill; //在选定项发生更改并且提交了该更改后发生 cmbFunctionArea.SelectionChangeCommitted += new EventHandler(cmbFunctionArea_SelectionChangeCommitted); //把ComboBox添加到DataGridTableStyle的第一列 dgtb.TextBox.Controls.Add(cmbFunctionArea); } //设置焦点模拟 private void GetFocus(int row,int col) { //先把焦点移动到DataGrid this.dgdFunctionArea.Focus(); //把焦点移动到DataGridCell DataGridCell dgc = new DataGridCell(row,col); this.dgdFunctionArea.CurrentCell = dgc; DataGridTextBoxColumn dgtb = (DataGridTextBoxColumn)dgdFunctionArea.TableStyles[0].GridColumnStyles[col]; //设置焦点 dgtb.TextBox.Focus(); } //把Combobox上修改的数据提交到当前的网格 private void cmbFunctionArea_SelectionChangeCommitted(object sender, EventArgs e) { this.dgdFunctionArea[this.dgdFunctionArea.CurrentCell] = ((ComboBox)sender).SelectedItem.ToString(); } //设置新的焦点 private void buttonFocus_Click(object sender, System.EventArgs e) { //焦点模拟,这里设置第三行第一列 GetFocus(2,0); } }}