报表查看器异常

Question

如何解决报表查看器中的这个异常？当 st parameters

时显示错误

An unhandled exception of type 'Microsoft.Reporting.WinForms.LocalProcessingException' occurred in Microsoft.ReportViewer.WinForms.dll Additional information: An error occurred during local report processing.

代码：

Form1 f1 = new Form1();

ReportDataSource ds = new ReportDataSource("DataSet1", dr);
f1.reportViewer1.Reset();
f1.reportViewer1.ProcessingMode =ProcessingMode.Local;
f1.reportViewer1.LocalReport.DataSources.Add(ds);
f1.reportViewer1.LocalReport.ReportPath = "clint.rdlc";
ReportParameter pr = new ReportParameter ("clint", comboBox1.SelectedItem.ToString());
f1.reportViewer1.LocalReport.SetParameters(pr);
f1.reportViewer1.RefreshReport();

Answer 1

您应该使用 SelectedText 而不是 SelectedItem。

之前

ReportParameter pr = new ReportParameter ("clint", comboBox1.SelectedItem.ToString());
f1.reportViewer1.LocalReport.SetParameters(pr);

之后

ReportParameter pr = new ReportParameter ("clint", comboBox1.SelectedText);
f1.reportViewer1.SetParameters(new ReportParameter[] { pr });

报表查看器异常

Report Viewer exception

c#

reportviewer