实现一个自定义验证器控件

今天由于项目需要在页面上实现一个复合验证功能,本来想用脚本实现,发现会写一大堆重复的隐藏代码.最后选择了自己实现一个自定义验证器控件.这样以后也可以直接拿来复用. 因为往往需要同时满足1:用户输入不能为空.2: 输入值必须满足相应的格式. 这样的功能.而不用再为数据库添加字段来完成.

代码如下:

using System;
2

using System.ComponentModel;
3

using System.Drawing;
4

using System.Security.Permissions;
5

using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
8

namespace Kim.AspNet.Validatator.Controls
10

{
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[
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AspNetHostingPermission(SecurityAction.Demand,
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Level = AspNetHostingPermissionLevel.Minimal),
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AspNetHostingPermission(SecurityAction.InheritanceDemand,
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Level = AspNetHostingPermissionLevel.Minimal),
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DefaultEvent("ValidTextBoxChanged"),
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DefaultProperty("Text"),
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ToolboxData("<{0}:ValidTextBox runat=\"server\"> </{0}:ValidTextBox>"),
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]
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public class ValidTextBox : CompositeControl
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{
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//Contact Ways
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private DropDownList validType;
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//User Enter Values
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private TextBox validTextBox;
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//valid user enter values
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//can not empty
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private RequiredFieldValidator emailValidator;
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private RequiredFieldValidator handphoneValidator;
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private RequiredFieldValidator phoneValidator;
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//have the right format
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private RegularExpressionValidator emilFormatValidator;
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private RegularExpressionValidator handphoneFormatValidator;
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private RegularExpressionValidator phoneFormatValidator;
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private static readonly object EventValidKey =
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new object();
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// get TextBox value
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[
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Bindable(true),
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Category("Appearance"),
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DefaultValue(""),
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Description("get value from textbox")
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]
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public string TextValue
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{
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get
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{
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EnsureChildControls();
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return validTextBox.Text;
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}
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set
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{
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EnsureChildControls();
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validTextBox.Text = value;
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}
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}
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[
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Bindable(true),
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Category("Appearance"),
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DefaultValue(""),
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Description("Error message for the phone validator.")
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]
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public string ValidPhoneErrorMessage
71

{
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get
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{
74

EnsureChildControls();
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return phoneValidator.ErrorMessage;
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}
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set
78

{
79

EnsureChildControls();
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phoneValidator.ErrorMessage = value;
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phoneValidator.ToolTip = value;
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}
83

}
84

[
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Bindable(true),
88

Category("Appearance"),
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DefaultValue(""),
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Description("Error message for the hand phone validator.")
91

]
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public string ValidHandPhoneErrorMessage
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{
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get
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{
96

EnsureChildControls();
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return handphoneValidator.ErrorMessage;
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}
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set
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{
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EnsureChildControls();
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handphoneValidator.ErrorMessage = value;
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handphoneValidator.ToolTip = value;
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}
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}
106

107

108

[
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Bindable(true),
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Category("Appearance"),
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DefaultValue(""),
112

Description("Error message for the e-mail validator.")
113

]
114

public string ValidEmailErrorMessage
115

{
116

get
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{
118

EnsureChildControls();
119

return emailValidator.ErrorMessage;
120

}
121

set
122

{
123

EnsureChildControls();
124

emailValidator.ErrorMessage = value;
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emailValidator.ToolTip = value;
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}
127

}
128

129

130

// The Valid event.
131

[
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Category("Action"),
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Description("Raised when the user input the value.")
134

]
135

public event EventHandler ValidTextBoxChanged
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{
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add
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{
139

Events.AddHandler(EventValidKey, value);
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}
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remove
142

{
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Events.RemoveHandler(EventValidKey, value);
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}
145

}
146

147

148

protected virtual void OnValidTextBoxChanged(EventArgs e)
149

{
150

EventHandler TextBoxChangedHandler =
151

(EventHandler)Events[EventValidKey];
152

if (TextBoxChangedHandler != null)
153

{
154

TextBoxChangedHandler(this, e);
155

}
156

}
157

158

159

private void _TextBox_Changed(object source, EventArgs e)
160

{
161

OnValidTextBoxChanged(EventArgs.Empty);
162

}
163

164

protected override void RecreateChildControls()
165

{
166

EnsureChildControls();
167

}
168

169

170

protected override void CreateChildControls()
171

{
172

Controls.Clear();
173

174

ListItem list;
175

validType = new DropDownList();
176

validType.ID = "validDrpList";
177

178

list = new ListItem();
179

list.Text = "电话";
180

list.Value = "0";
181

validType.Items.Add(list);
182

183

list = new ListItem();
184

list.Text = "邮件";
185

list.Value = "1";
186

validType.Items.Add(list);
187

188

list = new ListItem();
189

list.Text = "手机";
190

list.Value = "2";
191

validType.Items.Add(list);
192

193

validTextBox = new TextBox();
194

validTextBox.ID = "validTextBox";
195

196

//phone valid
197

phoneValidator = new RequiredFieldValidator();
198

phoneValidator.ID = "phoneValidator";
199

phoneValidator.ControlToValidate = validTextBox.ID;
200

phoneValidator.Text = "电话号码不能为空!";
201

phoneValidator.Display = ValidatorDisplay.Dynamic;
202

203

phoneFormatValidator = new RegularExpressionValidator();
204

phoneFormatValidator.ID = "phoneFormatValidation";
205

phoneFormatValidator.Text = "电话号码格式不正确";
206

phoneFormatValidator.Display = ValidatorDisplay.Dynamic;
207

phoneFormatValidator.ControlToValidate = validTextBox.ID;
208

phoneFormatValidator.ValidationExpression = @"(0\d{2}-\d{8}|0\d{3}-\d{7})-\d{2,4}|(0\d{2}-\d{8}|0\d{3}-\d{7})";
209

210

//email valid
211

emailValidator = new RequiredFieldValidator();
212

emailValidator.ID = "emailValidator";
213

emailValidator.ControlToValidate =
214

validTextBox.ID;
215

emailValidator.Text = "请输入邮件地址!";
216

emailValidator.Display = ValidatorDisplay.Dynamic;
217

218

emilFormatValidator = new RegularExpressionValidator();
219

emilFormatValidator.ID = "emailFormatValidation";
220

emilFormatValidator.Text = "邮件格式不正确";
221

emilFormatValidator.Display = ValidatorDisplay.Dynamic;
222

emilFormatValidator.ControlToValidate = validTextBox.ID;
223

emilFormatValidator.ValidationExpression=@"\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*";
224

225

//handphone valid
226

handphoneValidator = new RequiredFieldValidator();
227

handphoneValidator.ID = "handphoneValidator";
228

handphoneValidator.ControlToValidate =
229

validTextBox.ID;
230

handphoneValidator.Text = "请输入手机号码!";
231

handphoneValidator.Display = ValidatorDisplay.Dynamic;
232

233

handphoneFormatValidator = new RegularExpressionValidator();
234

handphoneFormatValidator.ID = "handphoneValidation";
235

handphoneFormatValidator.Text = "手机号码格式不正确";
236

handphoneFormatValidator.Display = ValidatorDisplay.Dynamic;
237

handphoneFormatValidator.ControlToValidate = validTextBox.ID;
238

handphoneFormatValidator.ValidationExpression = @"^1[3,5][0-9][0-9]{8}$";
239

240

validTextBox.TextChanged += new EventHandler(_TextBox_Changed);
241

validType.AutoPostBack = true;
242

243

this.Controls.Add(validType);
244

this.Controls.Add(validTextBox);
245

246

this.Controls.Add(phoneValidator);
247

this.Controls.Add(phoneFormatValidator);
248

249

this.Controls.Add(emailValidator);
250

this.Controls.Add(emilFormatValidator);
251

252

this.Controls.Add(handphoneValidator);
253

this.Controls.Add(handphoneFormatValidator);
254

}
255

256

protected override void Render(HtmlTextWriter writer)
257

{
258

AddAttributesToRender(writer);
259

writer.AddAttribute(
260

HtmlTextWriterAttribute.Cellpadding,
261

"1", false);
262

writer.RenderBeginTag(HtmlTextWriterTag.Table);
263

264

//phone valid
265

if (validType.SelectedIndex == 0)
266

{
267

writer.RenderBeginTag(HtmlTextWriterTag.Tr);
268

269

writer.RenderBeginTag(HtmlTextWriterTag.Td);
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validType.RenderControl(writer);
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writer.RenderEndTag();
272

273

writer.RenderBeginTag(HtmlTextWriterTag.Td);
274

validTextBox.RenderControl(writer);
275

writer.RenderEndTag();
276

277

writer.RenderBeginTag(HtmlTextWriterTag.Td);
278

phoneValidator.RenderControl(writer);
279

writer.RenderEndTag();
280

281

writer.RenderBeginTag(HtmlTextWriterTag.Td);
282

handphoneFormatValidator.RenderControl(writer);
283

writer.RenderEndTag();
284

285

writer.RenderEndTag();
286

}
287

//email valid
288

if (validType.SelectedIndex == 1)
289

{
290

writer.RenderBeginTag(HtmlTextWriterTag.Tr);
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writer.RenderBeginTag(HtmlTextWriterTag.Td);
292

validType.RenderControl(writer);
293

writer.RenderEndTag();
294

295

writer.RenderBeginTag(HtmlTextWriterTag.Td);
296

validTextBox.RenderControl(writer);
297

writer.RenderEndTag();
298

299

writer.RenderBeginTag(HtmlTextWriterTag.Td);
300

emailValidator.RenderControl(writer);
301

writer.RenderEndTag();
302

303

writer.RenderBeginTag(HtmlTextWriterTag.Td);
304

emilFormatValidator.RenderControl(writer);
305

writer.RenderEndTag();
306

307

writer.RenderEndTag();
308

}
309

//hand phone valid
310

if (validType.SelectedIndex == 2)
311

{
312

writer.RenderBeginTag(HtmlTextWriterTag.Tr);
313

writer.RenderBeginTag(HtmlTextWriterTag.Td);
314

validType.RenderControl(writer);
315

writer.RenderEndTag();
316

317

writer.RenderBeginTag(HtmlTextWriterTag.Td);
318

validTextBox.RenderControl(writer);
319

writer.RenderEndTag();
320

321

writer.RenderBeginTag(HtmlTextWriterTag.Td);
322

handphoneValidator.RenderControl(writer);
323

writer.RenderEndTag();
324

325

writer.RenderBeginTag(HtmlTextWriterTag.Td);
326

phoneFormatValidator.RenderControl(writer);
327

writer.RenderEndTag();
328

writer.RenderEndTag();
329

}
330

writer.RenderEndTag();
331

}
332

}
333

}

注意:开发环境为vs2008

posted on 2008-03-27 20:47 kim 阅读(2738) 评论(4) 收藏举报

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