.net - 我的代码中出现未知数据库连接器错误

Question

Dim rp As New ReportDocument
Dim myData As New MyDataSet
Dim dt As New MyDataSet.UserDataTable
Dim FirstRow As MyDataSet.UserRow = _
  CType(myData.User.NewRow, MyDataSet.UserRow)
FirstRow.MemberID = "1"
FirstRow.FirstName = "Amir Hossein"
FirstRow.LastName = "Rahnama"
myData.User.Rows.Add(FirstRow)

Dim SecondRow As MyDataSet.UserRow = _
  CType(myData.User.NewRow, MyDataSet.UserRow)
SecondRow.MemberID = "2"
SecondRow.FirstName = "Aziz"
SecondRow.LastName = "Khodaie"
myData.User.Rows.Add(SecondRow)

rp.Load("C:\Report.rpt")
rp.SetDataSource(myData)
CRV1.ReportSource = rp

设置数据源的时候报错:

Unknown Database Connector Error Error in File C:\DOCUME~1\A_RAHN~1\LOCALS~1\Temp\1\Report {832105B2-2E31-4018-9761-77581CC86142}.rpt: Unknown Database Connector Error

为了让您知道，我通过 Crystal Reports 2008 独立 IDE 创建了该报表，而不是在 VS2010 IDE 中生成它，并且它通过 Crystal 报表向导绑定(bind)到该数据集。

Answer 1

您需要做的是按以下顺序向启动元素添加一个属性:

 <startup useLegacyV2RuntimeActivationPolicy="true">        
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>