vb.net - How to create a report in VB.NET based on a single record (specifying the key record at runtime)

Question

I have been searching for days and I've found a lot but it doesn't always make sense. I am trying to create a one page report in a desktop VB.NET application (using Microsoft Report & ReportViewer so that installation of external utilities is not required on the client machine) that displays information from one record of a query (the query has multiple joins between tables and works just fine in access). I have managed to create a datasource with a dataset showing the query results in the designer and have built the report to look how I like by dragging the objects from Report Data/DataSets onto the report. How do I specify at run time which record from the query I want to display? Originally, I created a function that takes the record ID and returns a DataSet containing the record I require, that is how my form displays the information (data edits and additions are handled separately). Is there a way I can change the datasource for the report at runtime to this function and then send the report direct to PDF or printer?

Answer 1

您可以使用以下代码在运行时设置数据源：

（rv1 是您正在使用的报告查看器）dim bs as bindingsource

    rv1.LocalReport.DataSources.Clear()
    rv1.LocalReport.ReportEmbeddedResource = "namespace.ReportName.rdlc"

    bs.DataSource = dsyourdataset
    bs.DataMember = "tablename"
    Dim rds As New ReportDataSource
    rds.Name = "nametomatchnameonreport"
    rds.Value = bs
    rv1.LocalReport.DataSources.Add(rds)

至于没有 GUI 直接打印，这个链接有一些你可以使用的代码。