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如何在页的基类中执行page_load()?

page-lifecycle asp.net c#

DaveDev · 技术社区 · 14 年前

我有以下PerformanceFactSheet.aspx.cs页类

public partial class PerformanceFactsheet : FactsheetBase
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // do stuff with the data extracted in FactsheetBase
        divPerformance.Controls.Add(this.Data);
    }
}

其中factsheetbase定义为

public class FactsheetBase : System.Web.UI.Page
{
    public MyPageData Data { get; set; } 
    protected void Page_Load(object sender, EventArgs e)
    {
        // get data that's common to all implementors of FactsheetBase
        // and store the values in FactsheetBase's properties
        this.Data = ExtractPageData(Request.QueryString["data"]);            
    }
}

问题是factsheetbase的页面加载没有执行。

有人能告诉我我做错了什么吗?有没有更好的方法得到我想要的结果?

谢谢

6 回复 | 直到 6 年前

this. __curious_geek 14 年前

我们也面临同样的问题,你只要 在构造函数中注册处理程序。:)

public class FactsheetBase : System.Web.UI.Page 
{ 

    public FactsheetBase()
    {
        this.Load += new EventHandler(this.Page_Load);
    }

    public MyPageData Data { get; set; }  
    protected void Page_Load(object sender, EventArgs e) 
    { 
        // get data that's common to all implementors of FactsheetBase 
        // and store the values in FactsheetBase's properties 
        this.Data = ExtractPageData(Request.QueryString["data"]);             
    } 
}

另一种方法是 覆盖加载() 不太受欢迎。

public class FactsheetBase : System.Web.UI.Page 
{ 

    public FactsheetBase()
    {
    }

    public MyPageData Data { get; set; }  
    protected override void OnLoad(EventArgs e)
    {
        //your code
        // get data that's common to all implementors of FactsheetBase 
        // and store the values in FactsheetBase's properties 
        this.Data = ExtractPageData(Request.QueryString["data"]);             

        base.OnLoad(e);
    }
}

n8wrl 14 年前

在PerformanceFactSheet中重写onload()并调用base.onload()而不是page-load()方法

NeXuS 14 年前

嗯,我可能错了,但我相信这是由于继承:您正在重写派生类中的factsheetbase page_load方法。

为了执行它你应该做些

public partial class PerformanceFactsheet : FactsheetBase
{
    protected void Page_Load(object sender, EventArgs e)
    {
        base.Page_Load( sender, e );
        // do stuff with the data extracted in FactsheetBase
        divPerformance.Controls.Add(this.Data);
    }
}

编辑:n8wrl绝对给了你一个更清晰的解决方案(我不是aspx程序员)。

serkanh 12 年前

试试这个

 public partial class PerformanceFactsheet : FactsheetBase
{
    public PerformanceFactsheet()
    {
        this.Load += new EventHandler(this.Page_Load);
    }

    protected void Page_Load(object sender, EventArgs e)
    {            
        divPerformance.Controls.Add(this.Data);
    }
}

public abstract class FactsheetBase : System.Web.UI.Page
{
    public MyPageData Data { get; set; }
    public FactsheetBase()
    {
        this.Load += new EventHandler(this.Page_Load);
    }

    new protected void Page_Load(object sender, EventArgs e)
    {            
        this.Data = ExtractPageData(Request.QueryString["data"]);
    }
}

kav 9 年前

试试这个:

     public partial class PerformanceFactsheet : FactsheetBase
{
    protected override void Page_Load(object sender, EventArgs e)
    {
base.Page_Load(sender, e);
        // do stuff with the data extracted in FactsheetBase
        divPerformance.Controls.Add(this.Data);
    }
}

public class FactsheetBase : System.Web.UI.Page
{
    public MyPageData Data { get; set; } 
    protected virtual void Page_Load(object sender, EventArgs e)
    {
        // get data that's common to all implementors of FactsheetBase
        // and store the values in FactsheetBase's properties
        this.Data = ExtractPageData(Request.QueryString["data"]);            
    }
}

Tyler S. Loeper 6 年前

将页面加载设置为公共,并从另一个页面以如下方式调用它:

this.myPageOrUserControl.Page_Load(null, EventArgs.Empty);