自定义控件的使用
1、常用使用方法:
public class JmcDateTimePicker : WebControl, INamingContainer, IPostBackDataHandler
最主要是重载protected override void RenderContents(HtmlTextWriter writer) 这个方法,用
writer.WriteLine("<script language=\"JavaScript\">");
writer.RenderBeginTag(HtmlTextWriterTag.Input);
writer.RenderEndTag();
等方式在页面上输出html
2、验证控件的使用
服务器端验证
public class JmcDateTimePicker : WebControl, INamingContainer, IPostBackDataHandler
最主要是重载protected override void RenderContents(HtmlTextWriter writer) 这个方法,用
writer.WriteLine("<script language=\"JavaScript\">");
writer.RenderBeginTag(HtmlTextWriterTag.Input);
writer.RenderEndTag();
等方式在页面上输出html
2、验证控件的使用
服务器端验证
1 [DefaultProperty("Text"),
2 DefaultEvent("TextChanged"),
3 ValidationProperty("Text")]
4
5 [ToolboxData("<{0}:JmcDateTimePicker runat=server></{0}:JmcDateTimePicker>")]
6 public class JmcDateTimePicker : WebControl, INamingContainer, IPostBackDataHandler
7 {
8}
9
10..
11
12 public string Text
13 {
14 get
15 {
16 //String s = (String)ViewState["Text"];
17 //return ((s == null) ? String.Empty : s);
18 return this._txtDateTime.Text;
19 }
20
21 set
22 {
23 ViewState["Text"] = value;
24
25 EnsureChildControls();
26 _txtDateTime.Text = value;
27 }
28 }
最主要的是定义ValidationProperty("Text")元数据,并且实现Text属性,根据这个属性进行验证。2 DefaultEvent("TextChanged"),
3 ValidationProperty("Text")]
4
5 [ToolboxData("<{0}:JmcDateTimePicker runat=server></{0}:JmcDateTimePicker>")]
6 public class JmcDateTimePicker : WebControl, INamingContainer, IPostBackDataHandler
7 {
8}
9
10..
11
12 public string Text
13 {
14 get
15 {
16 //String s = (String)ViewState["Text"];
17 //return ((s == null) ? String.Empty : s);
18 return this._txtDateTime.Text;
19 }
20
21 set
22 {
23 ViewState["Text"] = value;
24
25 EnsureChildControls();
26 _txtDateTime.Text = value;
27 }
28 }