您的 button1_Click 应如下所示:

Your button1_Click should look like this:

private void button1_Click(object sender, EventArgs e)
{
    DataTable dt = GetSPResult();
    reportViewer1.Visible = true;
    reportViewer1.LocalReport.ReportPath = "Report1.rdlc";
    reportViewer1.LocalReport.DataSources.Clear();
    reportViewer1.LocalReport.DataSources.Add(new 
    Microsoft.Reporting.WinForms.ReportDataSource("DataSet1", dt));
}

请注意，从 GetSPResult 返回的 DataTable 应添加到报告中，而不是像您的代码中那样新创建的空白表.

Note that the DataTable returned from GetSPResult should be added to the report not a newly created blank table as in yourt code.