Winform 如何在DataGrid中加入ComboBox控件

转载自：http://www.thinksaas.cn/group/topic/302254/

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
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。
  1 using System;
  2 using System.Drawing;
  3 using System.Collections;
  4 using System.ComponentModel;
  5 using System.Windows.Forms;
  6 using System.Data;
  7 
  8 namespace DataGridBackColor
  9 {
 10     ///<summary>
 11     ///Form1的摘要描述。
 12     ///</summary>
 13     public class Form1 : System.Windows.Forms.Form
 14     {
 15         private System.Windows.Forms.DataGrid dataGrid;
 16         private System.Windows.Forms.DataGridTableStyle TableStyle;
 17         private System.Windows.Forms.DataGridBoolColumn Status;
 18         private System.Windows.Forms.DataGridTextBoxColumn DataGridTextBox1;
 19         private System.Windows.Forms.DataGridTextBoxColumn DataGridTextBox2;
 20         private System.Windows.Forms.DataGridTextBoxColumn DataGridComboBox;
 21         ///<summary>
 22         ///设计工具所需的变数。
 23         ///</summary>
 24         private System.ComponentModel.Container components = null;
 25 
 26         public Form1()
 27         {
 28             //
 29             // Windows Form 设计工具支持的必要项
 30             //
 31             InitializeComponent();
 32 
 33             //
 34             // TODO: 在InitializeComponent呼叫之后加入任何建构函式程序代码
 35             //
 36         }
 37 
 38         ///<summary>
 39         ///清除任何使用中的资源。
 40         ///</summary>
 41         protected override void Dispose(bool disposing)
 42         {
 43             if (disposing)
 44             {
 45                 if (components != null)
 46                 {
 47                     components.Dispose();
 48                 }
 49             }
 50             base.Dispose(disposing);
 51         }
 52 
 53         #region Windows Form 设计工具产生的程序代码
 54         ///<summary>
 55         ///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
 56         ///这个方法的内容。
 57         ///</summary>
 58         private void InitializeComponent()
 59         {
 60             System.Resources.ResourceManager resources = newSystem.Resources.ResourceManager(typeof(Form1));
 61             this.dataGrid = newSystem.Windows.Forms.DataGrid();
 62             this.TableStyle = newSystem.Windows.Forms.DataGridTableStyle();
 63             this.Status = newSystem.Windows.Forms.DataGridBoolColumn();
 64             this.DataGridTextBox1 = newSystem.Windows.Forms.DataGridTextBoxColumn();
 65             this.DataGridTextBox2 = newSystem.Windows.Forms.DataGridTextBoxColumn();
 66             this.DataGridComboBox = newSystem.Windows.Forms.DataGridTextBoxColumn();
 67             ((System.ComponentModel.ISupportInitialize)(this.dataGrid)).BeginInit();
 68             this.SuspendLayout();
 69             //
 70             // dataGrid
 71             //
 72             this.dataGrid.CaptionText = "DataGrid Example";
 73             this.dataGrid.DataMember = "";
 74             this.dataGrid.Dock = System.Windows.Forms.DockStyle.Fill;
 75             this.dataGrid.HeaderForeColor = System.Drawing.SystemColors.ControlText;
 76             this.dataGrid.Location = new System.Drawing.Point(0, 0);
 77             this.dataGrid.Name = "dataGrid";
 78             this.dataGrid.Size = new System.Drawing.Size(408, 238);
 79             this.dataGrid.TabIndex = 0;
 80             this.dataGrid.TableStyles.AddRange(new System.Windows.Forms.DataGridTableStyle[] {
 81 this.TableStyle});
 82             //
 83             // TableStyle
 84             //
 85             this.TableStyle.AlternatingBackColor = System.Drawing.Color.Wheat;
 86             this.TableStyle.BackColor = System.Drawing.Color.LightGray;
 87             this.TableStyle.DataGrid = this.dataGrid;
 88             this.TableStyle.ForeColor = System.Drawing.Color.MidnightBlue;
 89             this.TableStyle.GridColumnStyles.AddRange(new System.Windows.Forms.DataGridColumnStyle[] {
 90 this.Status,
 91 this.DataGridTextBox1,
 92 this.DataGridTextBox2,
 93 this.DataGridComboBox});
 94             this.TableStyle.GridLineColor = System.Drawing.Color.Black;
 95             this.TableStyle.HeaderBackColor = System.Drawing.Color.LightBlue;
 96             this.TableStyle.HeaderForeColor = System.Drawing.SystemColors.ControlText;
 97             this.TableStyle.MappingName = "";
 98             this.TableStyle.RowHeadersVisible = false;
 99             this.TableStyle.SelectionBackColor = System.Drawing.Color.LightSkyBlue;
100             this.TableStyle.SelectionForeColor = System.Drawing.Color.WhiteSmoke;
101             //
102             // Status
103             //
104             this.Status.AllowNull = false;
105             this.Status.FalseValue = false;
106             this.Status.HeaderText = "Status";
107             this.Status.MappingName = "";
108             this.Status.NullText = "";
109             this.Status.NullValue = ((object)(resources.GetObject("Status.NullValue")));
110             this.Status.TrueValue = true;
111             this.Status.Width = 40;
112             //
113             // DataGridTextBox1
114             //
115             this.DataGridTextBox1.Format = "";
116             this.DataGridTextBox1.FormatInfo = null;
117             this.DataGridTextBox1.HeaderText = "TextBox1";
118             this.DataGridTextBox1.MappingName = "";
119             this.DataGridTextBox1.NullText = "";
120             this.DataGridTextBox1.ReadOnly = true;
121             this.DataGridTextBox1.Width = 75;
122             //
123             // DataGridTextBox2
124             //
125             this.DataGridTextBox2.Format = "";
126             this.DataGridTextBox2.FormatInfo = null;
127             this.DataGridTextBox2.HeaderText = "TextBox2";
128             this.DataGridTextBox2.MappingName = "";
129             this.DataGridTextBox2.NullText = "";
130             this.DataGridTextBox2.Width = 75;
131             //
132             // DataGridComboBox
133             //
134             this.DataGridComboBox.Format = "";
135             this.DataGridComboBox.FormatInfo = null;
136             this.DataGridComboBox.HeaderText = "ComboBox";
137             this.DataGridComboBox.MappingName = "";
138             this.DataGridComboBox.NullText = "";
139             this.DataGridComboBox.Width = 75;
140             //
141             // Form1
142             //
143             this.AutoScaleBaseSize = new System.Drawing.Size(5, 15);
144             this.ClientSize = new System.Drawing.Size(408, 238);
145             this.Controls.Add(this.dataGrid);
146             this.Name = "Form1";
147             this.Text = "DataGrid Example";
148             this.Load += newSystem.EventHandler(this.Form1_Load);
149             ((System.ComponentModel.ISupportInitialize)(this.dataGrid)).EndInit();
150             this.ResumeLayout(false);
151 
152         }
153         #endregion
154 
155         ///<summary>
156         ///应用程序的主进入点。
157         ///</summary>
158         [STAThread]
159         static void Main()
160         {
161             Application.Run(newForm1());
162         }
163 
164         #region User Variable
165         private DataTable UserTable = null;
166         private DataView UserView = null;
167         #endregion
168 
169         #region comboBox Event
170         private void Form1_Load(object sender, System.EventArgs e)
171         {
172             try
173             {
174                 InitDataTable();
175                 InitDataView();
176                 InitDataGrid();
177                 InitData();
178             }
179             catch (Exception ex)
180             {
181                 MessageBox.Show(ex.Message);
182             }
183         }
184 
185         private void comboBox_SelectedIndexChanged(object sender, System.EventArgs e)
186         {
187             //将修改写回dataGrid的相应行
188             if (dataGrid != null)
189             {
190                 dataGrid[dataGrid.CurrentCell] = ((ComboBox)sender).SelectedItem.ToString();
191             }
192         }
193         #endregion
194 
195         private void InitDataTable()
196         {
197             UserTable = newDataTable("UserTable");
198             DataColumn[] d = newDataColumn[4];
199             d[0] = newDataColumn("d0", typeof(bool));
200             d[1] = newDataColumn("d1", typeof(string));
201             d[2] = newDataColumn("d2", typeof(string));
202             d[3] = newDataColumn("d3", typeof(string));
203             UserTable.Columns.AddRange(d);
204 
205             TableStyle.MappingName = "UserTable";
206             Status.MappingName = "d0";
207             DataGridTextBox1.MappingName = "d1";
208             DataGridTextBox2.MappingName = "d2";
209             DataGridComboBox.MappingName = "d3";
210 
211             //创建一个新的ComboBox控件并设置其基本属性
212             ComboBox comboBox = newComboBox();
213             comboBox.Items.AddRange(new object[] { "Choose1", "Choose2", "Choose3" });
214             comboBox.DropDownStyle = ComboBoxStyle.DropDownList;
215             comboBox.Dock = DockStyle.Fill;
216             DataGridComboBox.TextBox.Controls.Add(comboBox);//将comboBox加入DataGrid的相应行
217 
218             //关联comboBox的SelectedIndexChanged事件
219             comboBox.SelectedIndexChanged += newEventHandler(comboBox_SelectedIndexChanged);
220         }
221 
222         private void InitDataView()
223         {
224             UserView = newDataView();
225             UserView.Table = UserTable;
226             UserView.AllowNew = false;
227         }
228 
229         private void InitDataGrid()
230         {
231             dataGrid.DataSource = UserView;
232         }
233 
234         private void InitData()
235         {
236             DataRow r = null;
237             for (int count = 1; count < 4; count++)
238             {
239                 r = UserTable.NewRow();
240                 r[0] = true;
241                 r[1] = "TextBox1" + count.ToString();
242                 r[2] = "TextBox2" + count.ToString();
243                 r[3] = "Choose" + count.ToString();
244                 UserTable.Rows.Add(r);
245             }
246         }
247     }
248 }

 

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。
posted @ 2016-03-18 21:50  npucloud  阅读(339)  评论(0)  编辑  收藏  举报