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读使用反射将业务对象绑定到 ASP.NET 窗体控件有感

2007-09-13 10:45 543 查看

将页面与实体关联的方法:我也写了一个

编辑控件前台edit.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="edit.ascx.cs" Inherits="edit" %>

<asp:Label ID="Label1" runat="server" Text="编号"></asp:Label>

<asp:TextBox ID="txtID" runat="server"></asp:TextBox>

<br />

<asp:Label ID="Label2" runat="server" Text="姓名"></asp:Label>

<asp:TextBox ID="txtName" runat="server"></asp:TextBox>

<br />

<asp:Label ID="Label3" runat="server" Text="密码"></asp:Label>

<asp:TextBox ID="txtPwd" runat="server"></asp:TextBox>

<br />

<asp:Button ID="btnOp" runat="server" Text="操作" />

<asp:Button ID="btnBack" runat="server" Text="返回" />

后台代码edit.ascx.cs

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class edit : System.Web.UI.UserControl

...{

public int UserId

...{

set

...{

this.txtID.Text = value.ToString();

}

get

...{

if (this.txtID.Text != "")

return int.Parse(this.txtID.Text);

return 0;

}

public string UserName

...{

set

...{

this.txtName.Text = value;

}

get

...{

return this.txtName.Text;

}

public string Password

...{

set

...{

this.txtPwd.Text = value.ToString();

}

get

...{

return this.txtPwd.Text;

}

protected void Page_Load(object sender, EventArgs e)

...{

this.btnBack.Attributes.Add("onclick", "history.go(-1);");

}

前台显示的后台代码eidt.aspx.cs

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Reflection;

public partial class edit : System.Web.UI.Page

...{

protected void Page_Load(object sender, EventArgs e)

...{

User user=new User(95,"test","test");

PropertyInfo[] objProperties = user.GetType().GetProperties();

PropertyInfo[] ctlProperties = this.Edit1.GetType().GetProperties();
//public static object CopyProperty(object obj1, object obj2)
//{
// Type souType = user.GetType();
// Type tarType = this.Edit1.GetType();
// PropertyInfo[] pis = souType.GetProperties(BindingFlags.Public | BindingFlags.Instance);
// if (null != pis)
// {
// foreach (PropertyInfo pi in pis)
// {
// string propertyName = pi.Name;
// PropertyInfo pit = tarType.GetProperty(propertyName);
// if (pit != null)
// {
// pit.SetValue(obj2, pi.GetValue(obj1, null), null);
// }
// }
// }
// return obj2;
//}以下代码可被以上注释的代码替换

foreach (PropertyInfo objProperty in objProperties)

...{

foreach (PropertyInfo ctlProperty in ctlProperties)

...{

if (objProperty.Name == ctlProperty.Name)

...{

ctlProperty.SetValue(this.Edit1, objProperty.GetValue(user, null), null);
break;

}

前台eidt.aspx代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="edit.aspx.cs" Inherits="edit" Debug="true" %>

<%@ Register Src="edit.ascx" TagName="edit" TagPrefix="uc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Untitled Page</title>

</head>

<body>

<div>

<uc1:edit id="Edit1" runat="server">

</uc1:edit></div>

</form>

</body>

</html>

实体类代码:

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

/**//// <summary>

/// Summary description for User

/// </summary>

public class User

...{

"Fields and Properties"#region "Fields and Properties"

private int userId;

private string userName;

private string password;

public int UserId

...{

get ...{ return userId; }

set ...{ userId = value; }

}

public string UserName

...{

get ...{ return userName; }

set ...{ userName = value; }

}

public string Password

...{

get ...{ return password; }

set ...{ password = value; }

}

#endregion

"Constructors"#region "Constructors"

public User() ...{ }

public User(int id, string name, string password)

...{

this.UserId = id;

this.UserName = name;

this.Password = password;

}

#endregion

}

以上理解失误：请见http://blog.csdn.net/beimuaihui/archive/2007/09/14/1785035.aspx

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