C# 一个reportViewer中包含两个报告

我有一个名为reportviewer1的reportviewer 和两份报告（report1.rdlc，report2.rdlc） 我想通过使用代码在组合框中选择其中一个来将它们显示到reportviwer1中 我尝试了以下代码

 reportViewer1.LocalReport.DataSources.Add(new ReportDataSource("DataSet1"));

reportViewer1.LocalReport.ReportEmbeddedResource = "university_project.Report1.rdlc";

        reportViewer1.LocalReport.Refresh();

但它不起作用

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代码的正确格式是什么？ReportDataSource中是否缺少参数？

您也需要传递DataTable：

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reportViewer1.LocalReport.DataSources.Add（newreportdatasource（“DataSet1”，myDataTableWithData））

您需要指定记录的来源（填充数据集）并设置reportViewer的本地路径：

var dataSet = new DataSet();
using (var connection = new SqlConnection("ConnectionString")) 
{
    var sqlAdapter = new SqlDataAdapter("SELECT * FROM TABLE1",connection); // Get the records
    sqlAdapter.Fill(dataSet, "Table1");
}
ReportViewer1.Reset();
ReportViewer1.LocalReport.Path = "university_project.Report1.rdlc"; // Path to your report file            
var dataSource = new ReportDataSource("ReportDataSet_Name", dataSet.Tables[0]); // Specify report's dataset name and the records it use
ReportViewer1.LocalReport.DataSources.Clear(); // Clean the sources so you can use different datasources each time
ReportViewer1.LocalReport.DataSources.Add(datasource);
ReportViewer1.LocalReport.Refresh();