本文介绍了未知数据库连接器错误在我的代码的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
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
设置数据源时出现错误：
When setting the datasource It comes up with an error:
为了让您知道，我是由Crystal Reports 2008独立IDE创建该报告，而不是在VS2010中生成IDE，并将其绑定到使用水晶报表向导的数据集。
To let you know, I created that report by Crystal Reports 2008 Stand-alone IDE rather than generating it in VS2010 IDE and it is binded to that dataset dutring the crystal report wizard.
推荐答案
您需要做的是，属性以启动元素的顺序如下：
What you need to do is that you will add an attribute to startup element in the following order:
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
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