本篇文章主要介绍了"C#如何在DataGridViewCell中自定义脚本编辑器"，主要涉及到UserControl,Exception方面的内容，对于C#jrs看球网直播吧_低调看直播体育app软件下载_低调看体育直播感兴趣的同学可以参考一下：
上一篇博文探讨了如何自定义DataGridViewColumn实现一个TreeViewColumn来在DataGridView控件中显示TreeView...
上一篇博文探讨了如何自定义DataGridViewColumn实现一个TreeViewColumn来在DataGridView控件中显示TreeView控件，其实我们还可以继续发挥想象，自定义其他的列类型，下面介绍一个脚本编辑器列类型，我这里取名ScriptTextEditorColumn，当用户单击DataGridView的ScriptTextEditorColumn时，单元格右边会出现一个按钮，单击按钮会弹出一个脚本编辑器窗体，用户可以在窗体中进行代码维护，然后回写到单元格中。
用人会问，这个控件有啥实际作用，其实结合动态编译的技术，在datagridview中进行取值公式的模板设定，也就是在对应的单元格中设置C#脚本，然后动态执行后呈现结果到一个datagridview单元格中，这样就实现了动态配置datagridview后台计算逻辑的目的，当然实现这样的功能还需要大量的工作，但是主要的思路就是这样。
1 ScriptTextEditorColumn
1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5using System.Windows.Forms;
6 7namespace Host_Controls_in_Windows_Forms_DataGridView_Cells
8{
9publicclass ScriptTextEditorColumn : DataGridViewColumn
10 {
11public ScriptTextEditorColumn()
12 : base(new ScriptTextEditorCell())
13 {
14 }
15 16publicoverride DataGridViewCell CellTemplate
17 {
18get 19 {
20returnbase.CellTemplate;
21 }
22set 23 {
24// Ensure that the cell used for the template is a ScriptTextEditorCell. 25if (value != null &&
26 !value.GetType().IsAssignableFrom(typeof(ScriptTextEditorCell)))
27 {
28thrownew InvalidCastException("Must be a ScriptTextEditorCell");
29 }
30base.CellTemplate = value;
31 }
32 }
33 }
34 35//---------------------------------------------------------------------- 36publicclass ScriptTextEditorCell : DataGridViewTextBoxCell
37 {
38 39public ScriptTextEditorCell()
40 : base()
41 {
42 43 }
44 45publicoverridevoid InitializeEditingControl(int rowIndex, object 46 initialFormattedValue, DataGridViewCellStyle dataGridViewCellStyle)
47 {
48// Set the value of the editing control to the current cell value. 49base.InitializeEditingControl(rowIndex, initialFormattedValue,
50 dataGridViewCellStyle);
51 ScriptTextEditingControl ctl =
52 DataGridView.EditingControl as ScriptTextEditingControl;
53// Use the default row value when Value property is null. 54if (this.Value == null)
55 {
56 ctl.textBox1.Text = (String)this.DefaultNewRowValue;
57 }
58else 59 {
60 ctl.textBox1.Text = (String)this.Value;
61 }
62 }
63 64publicoverride Type EditType
65 {
66get 67 {
68// Return the type of the editing control that CalendarCell uses. 69returntypeof(ScriptTextEditingControl);
70 }
71 }
72 73publicoverride Type ValueType
74 {
75get 76 {
77// Return the type of the value that CalendarCell contains. 78 79returntypeof(String);
80 }
81 }
82 83publicoverrideobject DefaultNewRowValue
84 {
85get 86 {
87// Use the current date and time as the default value. 88string code = @" 89#region
90//jackwangcumt
91#endregion
92using System;
93using System.Collections.Generic;
94using System.ComponentModel;
95using System.Drawing;
96using System.Data;
97using System.Linq;
98using System.Text;
99using System.Windows.Forms;
100namespace Host_Controls_in_Windows_Forms_DataGridView_Cells
101{
102 public partial class SourceTextBox : UserControl
103 {
104 public SourceTextBox()
105 {
106 InitializeComponent();
107 this.textBox1.Location = this.Location;
108 this.textBox1.Width = this.Width;
109 this.textBox1.Height = this.Height;
110 }
111 protected void OnValueChanged(string text)
112 {
113 this.textBox1.Text = text;
114 }
115116 private void btnSource_Click(object sender, EventArgs e)
117 {
118 ScriptEditor frm = new ScriptEditor(this.textBox1.Text);
119 frm.ShowDialog();
120 this.textBox1.Text = frm.fastColoredTextBox1.Text;
121 }
122 }
123}
124";
125return code;
126 }
127 }
128 }
129//-----------------------------------------------------------------130131class ScriptTextEditingControl : SourceTextBox, IDataGridViewEditingControl
132 {
133 DataGridView dataGridView;
134privatebool valueChanged = false;
135int rowIndex;
136137public ScriptTextEditingControl()
138 {
139//文本变更更新到cell140this.textBox1.TextChanged += new EventHandler(textBox1_TextChanged);
141 }
142143void textBox1_TextChanged(object sender, EventArgs e)
144 {
145// Notify the DataGridView that the contents of the cell
146// have changed.147 valueChanged = true;
148this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
149//调用SourceTextBox的OnValueChanged(string Text)150base.OnValueChanged(this.textBox1.Text);
151 }
152153// Implements the IDataGridViewEditingControl.EditingControlFormattedValue
154// property.155publicobject EditingControlFormattedValue
156 {
157get158 {
159returnthis.textBox1.Text;
160 }
161set162 {
163if (value is String)
164 {
165try166 {
167// This will throw an Exception of the string is
168// null, empty, or not in the format of a date.169this.textBox1.Text=((String)value);
170 }
171catch172 {
173// In the case of an Exception, just use the
174// default value so we're not left with a null
175// value.176this.textBox1.Text = "jackwangcumt>>error";
177 }
178 }
179 }
180 }
181182// Implements the
183// IDataGridViewEditingControl.GetEditingControlFormattedValue method.184publicobject GetEditingControlFormattedValue(
185 DataGridViewDataErrorContexts context)
186 {
187return EditingControlFormattedValue;
188 }
189190// Implements the
191// IDataGridViewEditingControl.ApplyCellStyleToEditingControl method.192publicvoid ApplyCellStyleToEditingControl(
193 DataGridViewCellStyle dataGridViewCellStyle)
194 {
195this.Font = dataGridViewCellStyle.Font;
196//this.CalendarForeColor = dataGridViewCellStyle.ForeColor;
197//this.CalendarMonthBackground = dataGridViewCellStyle.BackColor;198 }
199200// Implements the IDataGridViewEditingControl.EditingControlRowIndex
201// property.202publicint EditingControlRowIndex
203 {
204get205 {
206return rowIndex;
207 }
208set209 {
210 rowIndex = value;
211 }
212 }
213214// Implements the IDataGridViewEditingControl.EditingControlWantsInputKey
215// method.216publicbool EditingControlWantsInputKey(
217 Keys key, bool dataGridViewWantsInputKey)
218 {
219// Let the DateTimePicker handle the keys listed.220switch (key & Keys.KeyCode)
221 {
222case Keys.Left:
223case Keys.Up:
224case Keys.Down:
225case Keys.Right:
226case Keys.Home:
227case Keys.End:
228case Keys.PageDown:
229case Keys.PageUp:
230returntrue;
231default:
232return !dataGridViewWantsInputKey;
233 }
234 }
235236// Implements the IDataGridViewEditingControl.PrepareEditingControlForEdit
237// method.238publicvoid PrepareEditingControlForEdit(bool selectAll)
239 {
240// No preparation needs to be done.241 }
242243// Implements the IDataGridViewEditingControl
244// .RepositionEditingControlOnValueChange property.245publicbool RepositionEditingControlOnValueChange
246 {
247get248 {
249returnfalse;
250 }
251 }
252253// Implements the IDataGridViewEditingControl
254// .EditingControlDataGridView property.255public DataGridView EditingControlDataGridView
256 {
257get258 {
259return dataGridView;
260 }
261set262 {
263 dataGridView = value;
264 }
265 }
266267// Implements the IDataGridViewEditingControl
268// .EditingControlValueChanged property.269publicbool EditingControlValueChanged
270 {
271get272 {
273return valueChanged;
274 }
275set276 {
277 valueChanged = value;
278 }
279 }
280281// Implements the IDataGridViewEditingControl
282// .EditingPanelCursor property.283public Cursor EditingPanelCursor
284 {
285get286 {
287returnbase.Cursor;
288 }
289 }
290291protectedoverridevoid OnTextChanged(EventArgs e)
292 {
293// Notify the DataGridView that the contents of the cell
294// have changed.295 valueChanged = true;
296this.EditingControlDataGridView.NotifyCurrentCellDirty(true);
297base.OnTextChanged(e);
298299 }
300301 }
302303304305 }2 SourceTextBox
1using System;
2using System.Collections.Generic;
3using System.ComponentModel;
4using System.Drawing;
5using System.Data;
6using System.Linq;
7using System.Text;
8using System.Windows.Forms;
910namespace Host_Controls_in_Windows_Forms_DataGridView_Cells
11{
12publicpartialclass SourceTextBox : UserControl
13 {
14public SourceTextBox()
15 {
16 InitializeComponent();
17this.textBox1.Location = this.Location;
18this.textBox1.Width = this.Width;
19this.textBox1.Height = this.Height;
20 }
21protectedvoid OnValueChanged(string text)
22 {
23this.textBox1.Text = text;
24 }
2526privatevoid btnSource_Click(object sender, EventArgs e)
27 {
28 ScriptEditor frm = new ScriptEditor(this.textBox1.Text);
29 frm.ShowDialog();
30this.textBox1.Text = frm.fastColoredTextBox1.Text;
31 }
32 }
33 }
1namespace Host_Controls_in_Windows_Forms_DataGridView_Cells
2{
3partialclass SourceTextBox
4 {
5/// 6/// 必需的设计器变量。
7/// 8private System.ComponentModel.IContainer components = null;
910///11/// 清理所有正在使用的资源。
12///13///如果应释放托管资源，为 true；否则为 false。14protectedoverridevoid Dispose(bool disposing)
15 {
16if (disposing && (components != null))
17 {
18 components.Dispose();
19 }
20base.Dispose(disposing);
21 }
2223#region 组件设计器生成的代码
2425///26/// 设计器支持所需的方法 - 不要
27/// 使用代码编辑器修改此方法的内容。
28///29privatevoid InitializeComponent()
30 {
31this.textBox1 = new System.Windows.Forms.TextBox();
32this.btnSource = new System.Windows.Forms.Button();
33this.SuspendLayout();
34//35// textBox1
36//37this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.None;
38this.textBox1.Location = new System.Drawing.Point(3, 3);
39this.textBox1.Margin = new System.Windows.Forms.Padding(4);
40this.textBox1.Multiline = true;
41this.textBox1.Name = "textBox1";
42this.textBox1.Size = new System.Drawing.Size(175, 21);
43this.textBox1.TabIndex = 1;
44//45// btnSource
46//47this.btnSource.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
48 | System.Windows.Forms.AnchorStyles.Right)));
49this.btnSource.BackColor = System.Drawing.Color.Transparent;
50this.btnSource.BackgroundImage = global::Host_Controls_in_Windows_Forms_DataGridView_Cells.Resource.setting;
51this.btnSource.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
52this.btnSource.FlatAppearance.BorderColor = System.Drawing.Color.White;
53this.btnSource.FlatAppearance.BorderSize = 0;
54this.btnSource.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
55this.btnSource.Font = new System.Drawing.Font("新宋体", 9F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
56this.btnSource.Location = new System.Drawing.Point(159, -1);
57this.btnSource.Margin = new System.Windows.Forms.Padding(0);
58this.btnSource.Name = "btnSource";
59this.btnSource.Size = new System.Drawing.Size(19, 25);
60this.btnSource.TabIndex = 0;
61this.btnSource.UseVisualStyleBackColor = false;
62this.btnSource.Click += new System.EventHandler(this.btnSource_Click);
63//64// SourceTextBox
65//66this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
67this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
68this.Controls.Add(this.btnSource);
69this.Controls.Add(this.textBox1);
70this.Margin = new System.Windows.Forms.Padding(0);
71this.Name = "SourceTextBox";
72this.Size = new System.Drawing.Size(178, 26);
73this.ResumeLayout(false);
74this.PerformLayout();
7576 }
7778#endregion7980public System.Windows.Forms.Button btnSource;
81public System.Windows.Forms.TextBox textBox1;
82 }
83 }View Code3 效果
