Winform DataGrid设计三步曲之二 如何在DataGrid中加入ComboBox控件 C#类库中的DataGrid控件功能非常强大，基本上可以应对一般的表格处理，但是对于特殊的要求，比如在DataGrid中加入单选框(ChechBox)和多选下拉菜单(ComboBox)时就要自己写一些代码了，在Framework1.1中的DataGrid并没有提供这方面的功能。下面介绍一种在DataGrid中加入ComboBox的方法。 1. 首先设置DataGrid的TableStyle 2. 然后利用DataGridTextBoxColumn中的TextBox.Controls属性把ComBoBox加入 3. 最后编写ComboBox的comboBox_SelectedIndexChanged事件，使修改可以保存回DataGrid的相应行。 如果对于TableStyle不太清楚，请参看我的前一篇文章 http://blog.csdn.net/tjvictor/archive/2007/01/20/1488549.aspx 下面是程序的完整例子，在vs2003中测试通过，代码说明在程序中，关于TableStyle的说明请参看上一篇文章。添加ComboBox的代码主要在InitDataTable()函数中。 using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace DataGridBackColor { ///<summary> /// Form1 的摘要描述。 ///</summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.DataGrid dataGrid; private System.Windows.Forms.DataGridTableStyle TableStyle; private System.Windows.Forms.DataGridBoolColumn Status; private System.Windows.Forms.DataGridTextBoxColumn DataGridTextBox1; private System.Windows.Forms.DataGridTextBoxColumn DataGridTextBox2; private System.Windows.Forms.DataGridTextBoxColumn DataGridComboBox; ///<summary> ///设计工具所需的变数。 ///</summary> private System.ComponentModel.Container components = null; public Form1() { // // Windows Form 设计工具支持的必要项 // InitializeComponent(); // // TODO: 在 InitializeComponent 呼叫之后加入任何建构函式程序代码 // } ///<summary> ///清除任何使用中的资源。 ///</summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form 设计工具产生的程序代码 ///<summary> ///此为设计工具支持所必须的方法 - 请勿使用程序代码编辑器修改 ///这个方法的内容。 ///</summary> private void InitializeComponent() { System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1)); this.dataGrid = new System.Windows.Forms.DataGrid(); this.TableStyle = new System.Windows.Forms.DataGridTableStyle(); this.Status = new System.Windows.Forms.DataGridBoolColumn(); this.DataGridTextBox1 = new System.Windows.Forms.DataGridTextBoxColumn(); this.DataGridTextBox2 = new System.Windows.Forms.DataGridTextBoxColumn(); this.DataGridComboBox = new System.Windows.Forms.DataGridTextBoxColumn(); ((System.ComponentModel.ISupportInitialize)(this.dataGrid)).BeginInit(); this.SuspendLayout(); // // dataGrid // this.dataGrid.CaptionText = "DataGrid Example"; this.dataGrid.DataMember = ""; this.dataGrid.Dock = System.Windows.Forms.DockStyle.Fill; this.dataGrid.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.dataGrid.Location = new System.Drawing.Point(0, 0); this.dataGrid.Name = "dataGrid"; this.dataGrid.Size = new System.Drawing.Size(408, 238); this.dataGrid.TabIndex = 0; this.dataGrid.TableStyles.AddRange(new System.Windows.Forms.DataGridTableStyle[] { this.TableStyle}); // // TableStyle // this.TableStyle.AlternatingBackColor = System.Drawing.Color.Wheat; this.TableStyle.BackColor = System.Drawing.Color.LightGray; this.TableStyle.DataGrid = this.dataGrid; this.TableStyle.ForeColor = System.Drawing.Color.MidnightBlue; this.TableStyle.GridColumnStyles.AddRange(new System.Windows.Forms.DataGridColumnStyle[] { this.Status, this.DataGridTextBox1, this.DataGridTextBox2, this.DataGridComboBox}); this.TableStyle.GridLineColor = System.Drawing.Color.Black; this.TableStyle.HeaderBackColor = System.Drawing.Color.LightBlue; this.TableStyle.HeaderForeColor = System.Drawing.SystemColors.ControlText; this.TableStyle.MappingName = ""; this.TableStyle.RowHeadersVisible = false; this.TableStyle.SelectionBackColor = System.Drawing.Color.LightSkyBlue; this.TableStyle.SelectionForeColor = System.Drawing.Color.WhiteSmoke; // // Status // this.Status.AllowNull = false; this.Status.FalseValue = false; this.Status.HeaderText = "Status"; this.Status.MappingName = ""; this.Status.NullText = ""; this.Status.NullValue = ((object)(resources.GetObject("Status.NullValue"))); this.Status.TrueValue = true; this.Status.Width = 40; // // DataGridTextBox1 // this.DataGridTextBox1.Format = ""; this.DataGridTextBox1.FormatInfo = null; this.DataGridTextBox1.HeaderText = "TextBox1"; this.DataGridTextBox1.MappingName = ""; this.DataGridTextBox1.NullText = ""; this.DataGridTextBox1.ReadOnly = true; this.DataGridTextBox1.Width = 75; // // DataGridTextBox2 // this.DataGridTextBox2.Format = ""; this.DataGridTextBox2.FormatInfo = null; this.DataGridTextBox2.HeaderText = "TextBox2"; this.DataGridTextBox2.MappingName = ""; this.DataGridTextBox2.NullText = ""; this.DataGridTextBox2.Width = 75; // // DataGridComboBox // this.DataGridComboBox.Format = ""; this.DataGridComboBox.FormatInfo = null; this.DataGridComboBox.HeaderText = "ComboBox"; this.DataGridComboBox.MappingName = ""; this.DataGridComboBox.NullText = ""; this.DataGridComboBox.Width = 75; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 15); this.ClientSize = new System.Drawing.Size(408, 238); this.Controls.Add(this.dataGrid); this.Name = "Form1"; this.Text = "DataGrid Example"; this.Load += new System.EventHandler(this.Form1_Load); ((System.ComponentModel.ISupportInitialize)(this.dataGrid)).EndInit(); this.ResumeLayout(false); } #endregion ///<summary> ///应用程序的主进入点。 ///</summary> [STAThread] static void Main() { Application.Run(new Form1()); } #region User Variable private DataTable UserTable = null; private DataView UserView = null; #endregion #region comboBox Event private void Form1_Load(object sender, System.EventArgs e) { try { InitDataTable(); InitDataView(); InitDataGrid(); InitData(); } catch( Exception ex ) { MessageBox.Show( ex.Message ); } } private void comboBox_SelectedIndexChanged(object sender , System.EventArgs e) { //将修改写回dataGrid的相应行 if( dataGrid != null ) { dataGrid[dataGrid.CurrentCell] = ((ComboBox)sender).SelectedItem.ToString(); } } #endregion private void InitDataTable() { UserTable = new DataTable("UserTable"); DataColumn[] d = new DataColumn[4]; d[0] = new DataColumn("d0",typeof(bool)); d[1] = new DataColumn("d1",typeof(string)); d[2] = new DataColumn("d2",typeof(string)); d[3] = new DataColumn("d3",typeof(string)); UserTable.Columns.AddRange( d ); TableStyle.MappingName = "UserTable"; Status.MappingName = "d0"; DataGridTextBox1.MappingName = "d1"; DataGridTextBox2.MappingName = "d2"; DataGridComboBox.MappingName = "d3"; //创建一个新的ComboBox控件并设置其基本属性 ComboBox comboBox = new ComboBox(); comboBox.Items.AddRange( new object[]{ "Choose1" , "Choose2" , "Choose3" }); comboBox.DropDownStyle = ComboBoxStyle.DropDownList; comboBox.Dock = DockStyle.Fill; DataGridComboBox.TextBox.Controls.Add( comboBox );//将comboBox加入DataGrid的相应行 //关联comboBox的SelectedIndexChanged事件 comboBox.SelectedIndexChanged += new EventHandler(comboBox_SelectedIndexChanged); } private void InitDataView() { UserView = new DataView(); UserView.Table = UserTable; UserView.AllowNew = false; } private void InitDataGrid() { dataGrid.DataSource = UserView; } private void InitData() { DataRow r = null; for( int count = 1 ; count < 4 ; count++ ) { r = UserTable.NewRow(); r[0] = true; r[1] = "TextBox1" + count.ToString(); r[2] = "TextBox2" + count.ToString(); r[3] = "Choose" + count.ToString(); UserTable.Rows.Add( r ); } } } } 运行结果如下： 在有些时候，DataGrid中不同行的值要以不同的颜色显示出来，比如告警，不同告警的背景色要不同，在下一篇文章中，我将介绍一下如何修改DataGrid的背景色问题。 http://blog.csdn.net/tjvictor/archive/2007/01/22/1489972.aspx
