ASP.NET中的Web控件介绍

 Button-Button

 Button-Button

[DefaultProperty("Text")]                                           //声明属性 [ToolboxData("<{0}:ServerControl1 runat=server>")]     //设置控件格式 public class ServerControl1 : WebControl { [Bindable(true)]                                                //设置是否支持绑定 [Category("Appearance")]                                        //设置类别 [DefaultValue("")]                                              //设置默认值 [Localizable(true)]                                         //设置是否支持本地化操作 public string Text                                              //定义Text属性 { get { String s = (String)ViewState["Text"]; return ((s == null) ? "[" + this.ID + "]" : s); } set { ViewState["Text"] = value; } } //为了实现服务器控件的智能属性配置，开发人员能够在源代码中编写属性 public string GuoJingString //编写属性 { get { return (String)ViewState["GuoJingString"]; } set { ViewState["GuoJingString"] = value; } } protected override void RenderContents(HtmlTextWriter output)           //页面呈现 { output.Write("定义的Text属性的值为:" + Text);                   //输出为页面呈现 } }

<%@ Register TagPrefix="MyControl" Namespace="ServerControl1" Assembly="ServerControl1" %>
 
 

public class ServerControl1 : WebControl { //创建服务器控件 public TextBox NameTextBox = new TextBox();                         //创建TextBox控件 public TextBox PasswordTextBox = new TextBox();                     //创建密码控件 public Button LoginButton = new Button();                            //创建Button控件 [Bindable(true)] [Category("Appearance")] [DefaultValue("")] [Localizable(true)] public string LoignBackGroundColor                              //设置背景属性 { get { return (String)ViewState["LoignBackGroundColor"]; } set { ViewState["LoignBackGroundColor"] = value; } } protected override void RenderContents(HtmlTextWriter output)           //编写页面输出 { output.RenderBeginTag(HtmlTextWriterTag.Div);                   //创建Div标签 output.RenderBeginTag(HtmlTextWriterTag.Tr);                    //创建Tr标签 NameTextBox.RenderControl(output);                          //添加控件 output.RenderBeginTag(HtmlTextWriterTag.Td);                    //创建Td标签 output.RenderBeginTag(HtmlTextWriterTag.Br);                    //创建Br标签 output.RenderBeginTag(HtmlTextWriterTag.Tr);                    //创建Tr标签 PasswordTextBox.RenderControl(output);                      //添加控件 output.RenderBeginTag(HtmlTextWriterTag.Td);                    //输出Td标签 } public event EventHandler LoginClick;                                   //声明事件 public void Submit_Click(object sender, EventArgs e) { EventArgs arg = new EventArgs();                            //编写按钮事件方法 if (LoginClick != null)                                     //判断事件冒泡是否为空 { LoginClick(LoginButton, arg);                               //触发事件 } } }

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="_11_4._Default" %><%@ Register TagPrefix="Sample" TagName="Login" Src="~/LoginForm.ascx" %>   
 
 

[DefaultProperty("Text")]                                           //默认属性 [ToolboxData("<{0}:MyPager runat=server>")]               //控件呈现代码 public class MyPager : WebControl { [Bindable(true)] [Category("Appearance")] [DefaultValue("")] [Localizable(true)] public string Text                                              //Text文本属性 { get { String s = (String)ViewState["Text"]; return ((s == null) ? "[" + this.ID + "]" : s); } set { ViewState["Text"] = value; } } [Bindable(true)] [Category("Data")] [DefaultValue(10)] [Localizable(true)] public int PageSize                                         //分页数属性 { get { try { Int32 s = (Int32)ViewState["PageSize"]; return ((s.ToString() == null) ? 10 : s); } catch { return 10; } } set { ViewState["PageSize"] = value; } } [Bindable(true)] [Category("Data")] [DefaultValue("")] [Localizable(true)] public string IndexPage                                     //索引页面 { get { String s = (String)ViewState["IndexPage"]; return ((s == null) ? ("none") : s); } set { ViewState["IndexPage"] = value; } } [Bindable(true)] [Category("Data")] [DefaultValue("")] [Localizable(true)] public int Rows                                      //总行数 { get { int s = (int)ViewState["Rows"]; return ((s.ToString() == null) ? 0 : s); } set { ViewState["Rows"] = value; } } protected override void RenderContents(HtmlTextWriter output) { string html = ""; int pageCount = 0;                                  //分页数 if (Rows % PageSize > 0)                            //开始分页 { pageCount = (Rows / PageSize) + 1;              //分页计算 } else { pageCount = Rows / PageSize; } html += ""; for (int i = 0; i ";                       //呈现相应的HTML } else { html += "";                            //完成HTML } html += "
";                       //呈现相应的HTML } html += "" + i + ""; html += "
"; output.Write(html);                             //页面呈现 } }

<%@ Register TagPrefix="MyControl" Namespace="MyPager" Assembly="MyPager" %>