How to pass Report parameter in ReportViewer Control

How to pass Report parameter in ReportViewer Control

• Amaltea

  Hi,

  If i try to use the same code, it is showing the following error:

  Value of type "ReportParameter" cannot be converted to One-dimensional array.

  Any idea/solution.

  Thanks in advance.

  
  
  

• vitfrasson

  See Microsoft documentation of how to use it:
  
  http://msdn2.microsoft.com/en-us/library/microsoft.reporting.winforms.serverreport.setparameters.aspx
  

• GordonBeMe

  You can do the following:

  parameters[0] = new ReportParameter(key,new string[] {null});

  
  

• Lee Evans

  Hi, you can do it like this:
  
  Dim objParameter As ReportParameter

  zobjParameter = New ReportParameter(strParamName, strParamValue)

  Me.objReportViewer.ServerReport.SetParameters(zstrParameter)
  
  
  Hope this helps!
  Alejandro.

  
  

• A. Jason

  If you have a parameter defined in the report itself, and have the report viewer control set up to display parameters, it is all taken care of for you.
  

• gmitchell7

  A small correction...
  
  Dim objParameter As ReportParameter

  zobjParameter = New ReportParameter(strParamName, strParamValue)

  Me.objReportViewer.ServerReport.SetParameters(zobjParameter)
  
  Alejandro.
  

  
  

• BMcK

  I can't seem to get that to work in VB. Still gives the error 'Paramater cannot be Null'. Any ideas on making that work in VB
  
  

• Dhanhamsan Gunalan

  Never mind. I figured it out. Just write this:

  parameters(0) = New ReportParameter("X")

  
  

• VB_Newbie

  could it be because of your report parameter setting in report designer
  

• patmur

  Thanks for reply

  I have used like the following.

  Microsoft.Reporting.WinForms.ReportParameter rprameter = new Microsoft.Reporting.WinForms.ReportParameter(paraName, paraValue);

  this.rvReportViewer.ServerReport.SetParameters(new Microsoft.Reporting.WinForms.ReportParameter[] {rprameter});

  and wroks fine. Now I need to pass null/Balnk value for the report. I have also set the property in report parameter to accept the Null and Blank value. But through codding it is not working.

   

  Thanks

  Nilna

   

  
  
  

• Anver

  Has anyone figured out how to pass a null value yet This code:

  parameters(0) = New ReportParameter("X", New String(Nothing))

  passes and empty string, not a null value.

  
  

• DataWranglerAtBellSouth

  I've used SSRS only but now I need to develop a report in a c# application and this is very confusing. There is a "Find" option at the top of the report viewer control, though do not know where this is coded.

  How can I just add a drop-down box or something to allow the user to select from a list of values (parameters)

  
  

• Sean Riddle

  The VB snippet in the documentation is incorrect. The SetParameters method takes a collection (array, list etc) of ReportParameters, not a single ReportParameter object.
  
  
  

• GChao

  I ended up populating the comboBox separately and passing the selected value to the report:

  private void frmRptPaintSysList_Load(object sender, EventArgs e)
  {
  populateComboBox();
  this.paintsysTableAdapter.Fill(this.usmDataSet_paintsys.paintsys);
  this.reportViewerPaintSysList.RefreshReport();
  }

  private void populateComboBox()
  {
  OleDbConnection cnn = new OleDbConnection(strCnn);
  OleDbDataReader dr = null;
  try
  {
  cboPaintSysReport.Items.Clear();
  string sSQL = "SELECT DISTINCT paintsys_code FROM paintsys ORDER BY paintsys_code";
  cnn.Open();
  OleDbCommand cmd = new OleDbCommand(sSQL, cnn);
  dr = cmd.ExecuteReader();
  if (dr != null)
  {
  while (dr.Read())
  {
  cboPaintSysReport.Items.Add(dr["paintsys_code"]);
  }
  }
  }
  catch (Exception ex)
  {
  throw ex;
  }
  finally
  {
  if (dr != null)
  {
  dr.Close();
  }
  cnn.Close();
  }
  }

  private void cboPaintSysReport_SelectedIndexChanged(object sender, EventArgs e)
  {
  this.paintsysTableAdapter.FillByCode(this.usmDataSet_paintsys.paintsys, cboPaintSysReport.Text);
  reportViewerPaintSysList.RefreshReport();
  }

  
  
• How to pass Report parameter in ReportViewer Control