LocalReport.SetParameters异常试图设置未在本报告中定义的报表参数'参数名称' [英] LocalReport.SetParameters Exception An attempt was made to set a report parameter 'ParameterName' that is not defined in this report

问题描述

我有两个按钮（按钮1，按钮2）
除了report2.rdlc两个按钮开两个相同的报告有一个字符串参数

如果我按下BUTTON1第一个消息框显示参数计数= 0（预期），我得到report1.rdlc显示在reportviewer1
如果当时我按下按钮2 消息框显示的参数计算= 0再次（我希望它显示1），我也得到LocalProcessingException {试图设置未在本报告中定义的报表参数'Report2ParameterString'。}

如果我第一次按下按钮2 消息框显示参数计数= 1（预期），我得到报告2显示在reportviewer1
如果当时我按下按钮1 <强>消息框显示参数计数= 1再次（我希望它显示0）我得到report1.rdlc显示在reportviewer1没有例外

我的代码是

 私人无效report1Button_Click（对象发件人，EventArgs五）
 {
 reportViewer1.LocalReport.ReportPath = Application.StartupPath +\\report1.rdlc 
 MessageBox.Show（参数数=+ reportViewer1.LocalReport.GetParameters（）Count.ToString（））; 
 reportViewer1.LocalReport.DataSources.Clear（）; 
 reportViewer1.LocalReport.DataSources.Add（新ReportDataSource（数据集1，reportDataTable））; 
 reportViewer1.RefreshReport（）; 
} 
私人无效report2Button_Click（对象发件人，EventArgs五）
 {
 reportViewer1.LocalReport.ReportPath = Application.StartupPath +\\report2.rdlc 
 MessageBox.Show（参数数=+ reportViewer1.LocalReport.GetParameters（）Count.ToString（））; 
 reportViewer1.LocalReport.SetParameters（新ReportParameter（Report2ParameterString，测试Report2ParameterString））; 
 reportViewer1.LocalReport.DataSources.Clear（）; 
 reportViewer1.LocalReport.DataSources.Add（新ReportDataSource（数据集1，reportDataTable））; 
 reportViewer1.RefreshReport（）; 
} 
  

解决方案

呼叫 ReportViewer.Reset（）加载新的报告之前

例如：

  reportViewer1.Reset（）; 
 reportViewer1.LocalReport.ReportPath = Application.StartupPath +\\report2.rdlc 
 ... 
  

i have two buttons (button1, button2) the two buttons open two identical report except that report2.rdlc has a string parameter

if i pressed button1 first the message box show parameters count = 0 (as expected) and i get report1.rdlc displayed in the reportviewer1 if then i pressed button2 the message box show parameters count = 0 again (i expect it to show 1) and i get LocalProcessingException {"An attempt was made to set a report parameter 'Report2ParameterString' that is not defined in this report."}

if i pressed button2 first the message box show parameters count = 1 (as expected) and i get report2 displayed in the reportviewer1 if then i pressed button1 the message box show parameters count = 1 again(i expect it to show 0) i get report1.rdlc displayed in the reportviewer1 without exceptions

my code is

private void report1Button_Click(object sender, EventArgs e)
    {
        reportViewer1.LocalReport.ReportPath = Application.StartupPath + "\\report1.rdlc";
        MessageBox.Show("parameters count =" + reportViewer1.LocalReport.GetParameters().Count.ToString());
        reportViewer1.LocalReport.DataSources.Clear();
        reportViewer1.LocalReport.DataSources.Add(new ReportDataSource("DataSet1", reportDataTable));
        reportViewer1.RefreshReport();
    }
    private void report2Button_Click(object sender, EventArgs e)
    {
        reportViewer1.LocalReport.ReportPath = Application.StartupPath + "\\report2.rdlc";
        MessageBox.Show("parameters count =" +reportViewer1.LocalReport.GetParameters().Count.ToString());
        reportViewer1.LocalReport.SetParameters(new ReportParameter("Report2ParameterString", " testing Report2ParameterString"));
        reportViewer1.LocalReport.DataSources.Clear();
        reportViewer1.LocalReport.DataSources.Add(new ReportDataSource("DataSet1", reportDataTable));
        reportViewer1.RefreshReport();
    }

解决方案

Call ReportViewer.Reset() before loading the new report.

For example:

reportViewer1.Reset();
reportViewer1.LocalReport.ReportPath = Application.StartupPath + "\\report2.rdlc";
...

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