c#代码分析

Assembly.LoadFrom(file)

已知程序集的文件名或路径，加载程序集。

Assembly.GetTypes() 

获取此程序集中定义的类型。

 

Assembly.CreateInstance()与Activator.CreateInstance()方法的区别

 

 

Button.ValidationGroup 属性

获取或设置在 Button 控件回发到服务器时要进行验证的控件组。

 

向导控件（asp:Wizard）

<asp:Wizard ID="Wizard1" runat="server" HeaderText="Sample Wizard" > <WizardSteps> <asp:WizardStep runat="server" Title="第一步" StepType="Start"> <asp:Label ID="Label1" runat="server" Text="用户名："></asp:Label> <asp:TextBox ID="tbName" runat="server"></asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="tbName" ErrorMessage="不能为空!"></asp:RequiredFieldValidator> <br /> <asp:Label ID="Label2" runat="server" Text="密码："></asp:Label> <asp:TextBox ID="tbPwd" runat="server"></asp:TextBox> </asp:WizardStep> <asp:WizardStep runat="server" Title="第二步"> <asp:Label ID="Label3" runat="server" Text="Email"></asp:Label> <asp:TextBox ID="tbEmail" runat="server"></asp:TextBox><br /> <asp:Label ID="Label4" runat="server" Text="Telephone"></asp:Label> <asp:TextBox ID="tbPhone" runat="server"></asp:TextBox> </asp:WizardStep> </WizardSteps> </asp:Wizard>

<asp:wizard>包含<wizardSteps>,<wizardsteps>中只能有<asp:wizardStep>;其中的<asp:wizardstep>可有多个，也就是某个流程的步骤。

下面是pet shop中的例子：

 <asp:Button ID="StepNextButton" runat="server" CommandName="MoveNext" CssClass="signinButton" Text="Sign Up" ValidationGroup="CreateUserWizard" />

 

  <asp:CreateUserWizard ID="CreateUserWizard" runat="server" CreateUserButtonText="Sign Up" InvalidPasswordErrorMessage="Please enter a more secure password." PasswordRegularExpressionErrorMessage="Please enter a more secure password." RequireEmail="False" SkinID="NewUser"> <WizardSteps> <asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server"> <CustomNavigationTemplate> </CustomNavigationTemplate> <ContentTemplate> <asp:Panel ID="panFocus" runat="server" DefaultButton="StepNextButton"> <table border="0" width="387"> <tr> <td align="left" class="signinHeader" colspan="2" > Sign Up for Your New Account</td> </tr> <tr> <td align="left"> <label for="UserName"> User Name:</label></td><td> <asp:TextBox ID="UserName" runat="server" CssClass="signinTextbox" Width="155px"></asp:TextBox> <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName" ErrorMessage="User Name is required." ToolTip="User Name is required." ValidationGroup="CreateUserWizard">*</asp:RequiredFieldValidator> </td> </tr> <tr> <td align="left"> <label for="Password"> Password:</label></td><td> <asp:TextBox ID="Password" runat="server" CssClass="signinTextbox" TextMode="Password" Width="155px"></asp:TextBox> <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password" ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="CreateUserWizard">*</asp:RequiredFieldValidator> </td> </tr> <tr> <td align="left"> <label for="ConfirmPassword"> Confirm Password:</label></td><td> <asp:TextBox ID="ConfirmPassword" runat="server" CssClass="signinTextbox" TextMode="Password" Width="155px"></asp:TextBox> <asp:RequiredFieldValidator ID="ConfirmPasswordRequired" runat="server" ControlToValidate="ConfirmPassword" ErrorMessage="Confirm Password is required." ToolTip="Confirm Password is required." ValidationGroup="CreateUserWizard">*</asp:RequiredFieldValidator> </td> </tr> <tr> <td align="center" colspan="2"> <asp:CompareValidator ID="PasswordCompare" runat="server" ControlToCompare="Password" ControlToValidate="ConfirmPassword" Display="Dynamic" ErrorMessage="The Password and Confirmation Password must match." ValidationGroup="CreateUserWizard"></asp:CompareValidator> </td> </tr> <tr> <td align="center" colspan="2" style="color: red" mce_style="color: red"> <asp:Literal ID="ErrorMessage" runat="server" EnableViewState="False" /> </td> </tr> </table> <table border="0" cellspacing="5" width="387"> <tr align="right"> <td align="right"> <asp:Button ID="StepNextButton" runat="server" CommandName="MoveNext" CssClass="signinButton" Text="Sign Up" ValidationGroup="CreateUserWizard" /> </td> <td> </td> </tr> </table> </asp:Panel> </ContentTemplate> </asp:CreateUserWizardStep> <asp:CompleteWizardStep ID="CompleteWizardStep1" runat="server"> <ContentTemplate> <p class="signinLabel"> <br /> <b>Thank you for signing up.</b></p> <p class="signinLabel"> Your account has been created. Now you can:</p> </p> <p class="signinLabel"> <a class="signinNewUser" href="Default.aspx" mce_href="Default.aspx">Continue shopping</a> </p> <p class="signinLabel"> <a class="signinNewUser" href="CheckOut.aspx" mce_href="CheckOut.aspx">Check out</a> </p> <p class="signinLabel"> <a class="signinNewUser" href="UserProfile.aspx" mce_href="UserProfile.aspx">Update your profile</a> </p> <p>  </p> </ContentTemplate> </asp:CompleteWizardStep> </WizardSteps> </asp:CreateUserWizard>

http://www.code-design.cn/blogdetail2416.html

 

用强类型的范型集合代替了原来的弱类型集合

IList<ProductInfo>

List <>使用强类型,减少拆箱和装箱
List <T>泛型数组 存放的是一个一个的被对象化的数据模型
类型安全，面向接口编程

如：

/// <summary> /// Query for products by category /// </summary> /// <param name="category">category name</param> /// <returns>A Generic List of ProductInfo</returns> public IList<ProductInfo> GetProductsByCategory(string category) { IList<ProductInfo> productsByCategory = new List<ProductInfo>(); SqlParameter parm = new SqlParameter(PARM_CATEGORY, SqlDbType.VarChar, 10); parm.Value = category; //Execute a query to read the products using (SqlDataReader rdr = SqlHelper.ExecuteReader(SqlHelper.ConnectionStringLocalTransaction, CommandType.Text, SQL_SELECT_PRODUCTS_BY_CATEGORY, parm)) { while (rdr.Read()) { ProductInfo product = new ProductInfo(rdr.GetString(0), rdr.GetString(1), rdr.GetString(2), rdr.GetString(3), rdr.GetString(4)); productsByCategory.Add(product); } } return productsByCategory; }

using System;namespace PetShop.Model { /// <summary> /// Business entity used to model a product /// </summary> [Serializable] public class ProductInfo { // Internal member variables private string id; private string name; private string description; private string image; private string categoryId; /// <summary> /// Default constructor /// </summary> public ProductInfo() { } /// <summary> /// Constructor with specified initial values /// </summary> /// <param name="id">Product Id</param> /// <param name="name">Product Name</param> /// <param name="description">Product Description</param> /// <param name="image">Product image</param> /// <param name="categoryId">Category Id</param> public ProductInfo(string id, string name, string description, string image, string categoryId) { this.id = id; this.name = name; this.description = description; this.image = image; this.categoryId = categoryId; } // Properties public string Id { get { return id; } } public string Name { get { return name; } } public string Description { get { return description; } } public string Image { get { return image; } } public string CategoryId { get { return categoryId; } } }}

new、abstract、virtual、override，sealed关键字区别

Public abstract void pay();                 abstract方法没有方法实现，必须继承

Public sealed override void pay(){}      sealed方法必须是重写父类的方法

Public static void pay(){}                   static方法通过类名访问

Public virtual void pay(){}                  virtual方法子类可以对其override或new

Public new void pay(){}                     父类的方法pay不一定是virtual

Public override void pay(){}                父类的方法pay一定要是virtual