How to Pass multiple parameters from C# to crystal reports

Question

I used this cod for pass a parameter to CR but can't pass multiple parameters!!! how to change this code for pass multiple parameters from C# to crystal reports?

ReportDocument cryRpt1 = new ReportDocument();
cryRpt1.Load("C:\\Users\\BilgiSoft\\Desktop\\RPTLetter1.rpt");

ParameterFieldDefinitions crParameterFieldDefinitions;
ParameterFieldDefinition crParameterFieldDefinition;
ParameterValues crParameterValues = new ParameterValues();
ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

crParameterDiscreteValue.Value = comboBox1.Text;
crParameterFieldDefinitions = cryRpt1.DataDefinition.ParameterFields;
crParameterFieldDefinition = crParameterFieldDefinitions["My Parameter"];
crParameterValues = crParameterFieldDefinition.CurrentValues;

crParameterValues.Clear();
crParameterValues.Add(crParameterDiscreteValue);
crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

crystalReportViewer1.ReportSource = cryRpt1;
crystalReportViewer1.Refresh();

Answer 1

Here is an example:

ReportDocument cryRpt1 = new ReportDocument();
cryRpt1.Load("C:\\Users\\BilgiSoft\\Desktop\\RPTLetter1.rpt");

ParameterValues crParameterValues = new ParameterValues();
//Add first param
ParameterFieldDefinitions crParameterFieldDefinitions = cryRpt1.DataDefinition.ParameterFields;
crParameterFieldDefinition = crParameterFieldDefinitions["My Parameter"];
crParameterValues = crParameterFieldDefinition.CurrentValues;
ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();
crParameterDiscreteValue.Value = comboBox1.Text;
crParameterValues.Add(crParameterDiscreteValue);

//add second param
ParameterFieldDefinitions crParameterFieldDefinitions = cryRpt1.DataDefinition.ParameterFields;
crParameterFieldDefinition = crParameterFieldDefinitions["My Parameter 2"];
crParameterValues = crParameterFieldDefinition.CurrentValues;
ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();
crParameterDiscreteValue.Value = comboBox2.Text;
crParameterValues.Add(crParameterDiscreteValue);

crystalReportViewer1.ReportSource = cryRpt1;
crystalReportViewer1.Refresh();