Question

我在asp.net 2010中使用Sap Crystal Report 当我刷新报告时，它会显示错误no valid report source id available，或者在运行时使用报告查看器工具显示移至下一页 这是我的编码，

 Dim crdoc5 As New ReportDocument()
 Dim crtablogoninfo5 As New TableLogOnInfo
 Dim crtabs5 As Tables

 If Not IsPostBack Then
      crdoc5.Load(Server.MapPath("CrStaffrecruit.rpt"))
      Session.Add("CrStaffrecruit", crdoc5)
      CrystalReportViewer5.ReportSource = crdoc5
  Else
      CrystalReportViewer5.ReportSource = Session("CrStaffrecruit")
  End If

  crdoc5.Load(Server.MapPath("CrStaffrecruit.rpt"))
  Dim crconninfo5 As New ConnectionInfo()
  rconninfo5.ServerName = "servername"
  crconninfo5.DatabaseName = "databasename"
  crconninfo5.UserID = "sa"
  crconninfo5.Password = ""

  crtabs5 = crdoc5.Database.Tables()
  For Each crtab5 As CrystalDecisions.CrystalReports.Engine.Table In crtabs5
      crtablogoninfo5 = crtab5.LogOnInfo
      crtablogoninfo5.ConnectionInfo = crconninfo5
      crtab5.ApplyLogOnInfo(crtablogoninfo5)
  Next

  CrystalReportViewer5.ReportSource = crdoc5
  CrystalReportViewer5.RefreshReport()

如果有人知道请帮助我... 提前致谢

Answer 1

为此，请浏览以下链接

http://forums.sdn.sap.com/thread.jspa?messageID=10951477&#10951477

Answer 2

虽然下面的代码在C＃中，但将它翻译成VB应该不会太难，它应该可以解决你的问题：

protected void Page_Load(object sender, EventArgs e)
{
        if (Page.IsPostBack)
        {
            //whatever you do when the page is loaded for the first time
            //this could even be bindReport();
        }
        else
        {
            bindReport();
        }
}

public void bindReport()
{
        ReportDocument rptDoc = new ReportDocument();
        dsSample ds = new dsSample(); // .xsd file name
        DataTable dt = new DataTable();
        // Just set the name of data table
        dt.TableName = "Crystal Report Example";
        dt = getMostDialledNumbers(); //This function populates the DataTable
        ds.Tables[0].Merge(dt, true, MissingSchemaAction.Ignore);
        // Your .rpt file path will be below
        rptDoc.Load(Server.MapPath("yourReportFilePath.rpt"));
        //set dataset to the report viewer.
        rptDoc.SetDataSource(ds);
        CrystalReportViewer1.ReportSource = rptDoc;
        CrystalReportViewer1.RefreshReport();
        //in case you have an UpdatePanel in your page, it needs to be updated
        UpdatePanel1.Update();
}

Answer 3

我遇到了同样的问题。您在什么情况下执行您发布的代码？我问，因为经过大量调试后，我发现你需要将代码放在Page_Load中（而不是像以前那样在PreRender中进行...）

希望这有帮助。

Answer 4

我已多次遇到此问题，解决方法是在会话中保存Report Document变量，然后在Page_load中输入以下代码：

if (IsPostBack)
{
    if (Session["reportDocument"] != null)
    {
        ReportDocument cr = new ReportDocument();
        cr = (ReportDocument)Session["reportDocument"];
        CrystalReportViewer1.ReportSource = cr;
        CrystalReportViewer1.DataBind();
    }
}

NB：不要忘记使用“显示”按钮填充(Session["reportDocument"])。

Answer 5

浏览以下链接。我解决了同样的问题。

http://www.aspsnippets.com/Articles/ASPNet-Crystal-Reports-13-Visual-Studio-2010-CrystalReportViewer-Search-Button-Issue---No-valid-report-source-is-available.aspx

没有有效的报告来源。在asp.net sap crystal报告中

5 个答案: