如何通过vb.net代码将参数传递给Crystal报表 [英] How to pass parameters to crystal report from vb.net code

问题描述

我创建了一个水晶报表（交叉标签）。我没有使用任何数据集，而是使用了水晶报表中的向导从数据库架构
调用一个过程（提供程序是oracle的Microsoft OLEDB提供程序，之后我提供了数据库凭据（即架构，用户名，密码），然后选择过程并选择我要在报告中显示的列）。

我需要从前端传递5个参数来生成报告。在查看水晶报表预览时，通过提供参数，报表可以正常工作。

现在，我想从前端（vb.net）传递这5个参数来显示CrystalReportViewer中的报表。请建议将代码写入aspx.vb文件。
（PS：-我确实浏览了其他论坛，并找到了一些代码，但是所有人都给出了一些或另一个错误，因此发布了一个，以便我可以获取特定于我要求的代码）。 / p>

预先感谢。.

解决方案

我已经收到报告工作...
我写了以下代码：

  Dim RptDocument作为新ReportDocument 
 
 RptDocument.Load（Server.MapPath（ rpt\Report.rpt））
 
 RptDocument.SetParameterValue（ param1，Session（ param1））
 RptDocument.SetParameterValue（  param2，ddlparam2.SelectedValue）
 RptDocument.SetParameterValue（ param3，param3.text）
 RptDocument.SetParameterValue（ param4，param4.text）
 RptDocument.SetParameterValue（ param5 ，param5.text）
 
'设置登录信息
将myLogin设置为CrystalDecisions.Shared.TableLogOnInfo 
 
将myTable设置为表
对于每个myTable RptDocument.Database.Tables 
 myLogin = myTable.LogOnInfo 
 myLogin.ConnectionInfo.ServerName =服务器名称 
 myLogin.ConnectionInfo.DatabaseName = 
 myLogin.ConnectionInfo.UserID = userid 
 myLogin .ConnectionInfo.Password = pwd 
 myTable.ApplyLogOnInfo（myLogin）
 myTable.Location = myTable.Location 
 
 CrystalReportViewer1.ReportSource = RptDocument 
  

创建系统DNS，并且必须添加 Oracle.DataAccess.dll 进行引用和一个类文件（其功能与connectooracle.vb类文件中的功能相同，但名称不同），还在global.asax中设置一个连接以引用该类连接，并使用
导入Oracle .DataAccess.Client 而不是导入System.Data.OracleClient （以避免歧义）...

这以某种方式使其起作用，并且可能对此有其他解决方案.. ::）

 （供参考：- 广告ding myLogin.ConnectionInfo.IntegratedSecurity = True给我这个错误-
登录失败。文件C中的错误：\DOCUME〜1\用户名\LOCALS〜1\Temp\Report {1AG3DD86-141D-43YA-B6A2-AEDF3459AE49} .rpt：无法连接：错误的登录参数。）
  

I have created a crystal report (cross tab). I'm not using any dataset, instead I used the wizard in crystal report to call an procedure from my Database schema (Provider given is Microsoft OLEDB provider for oracle, after which I gave my DB credentials(i.e. schema, username, password) and selected the procedure and selected the columns I wanted to display in the report).

There are 5 parameters that I need to pass it from the front end to generate the report. While viewing the crystal report preview, by giving parameters, the report works fine.

Now i want to pass these 5 parameters from the front end(vb.net) to show the report in the CrystalReportViewer. Please suggest the code to write in aspx.vb file. (PS:- I did go through other forums and found out some code, but all of them were giving some or the other error, so am posting one so that i can get the code specific to my requirement).

Thanks in advance..

解决方案

I have gotten the report to work... I wrote the code below:

    Dim RptDocument As New ReportDocument

    RptDocument.Load(Server.MapPath("rpt\Report.rpt"))

    RptDocument.SetParameterValue("param1", Session("param1"))
    RptDocument.SetParameterValue("param2", ddlparam2.SelectedValue)
    RptDocument.SetParameterValue("param3", param3.text)
    RptDocument.SetParameterValue("param4", param4.text)
    RptDocument.SetParameterValue("param5", param5.text)

    'Set login info
    Dim myLogin As CrystalDecisions.Shared.TableLogOnInfo

    Dim myTable As Table
    For Each myTable In RptDocument.Database.Tables
        myLogin = myTable.LogOnInfo
        myLogin.ConnectionInfo.ServerName = "server name"
        myLogin.ConnectionInfo.DatabaseName = ""
        myLogin.ConnectionInfo.UserID = "userid"
        myLogin.ConnectionInfo.Password = "pwd"
        myTable.ApplyLogOnInfo(myLogin)
        myTable.Location = myTable.Location

    CrystalReportViewer1.ReportSource = RptDocument

Created a System DNS and had to add Oracle.DataAccess.dll to reference and a class file (with functions same as that in connectooracle.vb class file but with different name), also set up a connection in global.asax to refer to that class connection and using Imports Oracle.DataAccess.Client instead of Imports System.Data.OracleClient (to avoid ambiguity)...

This somehow made it work and there might be some other solution for that..:)

(For ref:- Adding  myLogin.ConnectionInfo.IntegratedSecurity = True  gave me this error--
Logon failed. Error in File C:\DOCUME~1\Username\LOCALS~1\Temp\Report {1AG3DD86-141D-43YA-B6A2-AEDF3459AE49}.rpt: Unable to connect: incorrect log on parameters.)

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