DevExpress Report web 绑定数据后没有显示的解决方法

1、说明

     在aspx页面中点击按钮,在reportview中显示报表,但是点击按钮后没有反应

2、解决

   (1)不要讲reportview和具体的报表在设计时建立绑定关系

   (2)在page_load事件中添加如下代码

   

if (!IsPostBack & !IsCallback)
            Session["Value"] = null;

        if (Session["Value"] != null)
            ReportViewer1.Report = new ReportLibrary.BasicXtraReport();

   (3)绑定数据

 

 Session["Value"] = Guid.NewGuid();
        ReportViewer1.Report = new ReportLibrary.BasicXtraReport();
      ReportViewer1.DataBind();

(4)绑定reportview的从内存中读取数据的事件

 

 protected void ReportViewer1_CacheReportDocument(object sender, CacheReportDocumentEventArgs e)
    {
        e.Key = Guid.NewGuid().ToString();
        Page.Session[e.Key] = e.SaveDocumentToMemoryStream();
    }
    protected void ReportViewer1_RestoreReportDocumentFromCache(object sender, RestoreReportDocumentFromCacheEventArgs e)
    {
        Stream stream = Page.Session[e.Key] as Stream;
        if (stream != null)
            e.RestoreDocumentFromStream(stream);
    }


 

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