How to pass parameter in Crystal report from c#

To pass parameter programmeticaly create parameter in crystal report follow link below

http://csharp.net-informations.com/crystal-reports/csharp-crystal-reports-string-parameter.htm

just need to change following code

here code is used like that

private void button1_Click(object sender, EventArgs e)

        {             ReportDocument cryRpt = new ReportDocument();

            cryRpt.Load("PUT CRYSTAL REPORT PATH HERE\CrystalReport1.rpt");

             ParameterFieldDefinitions crParameterFieldDefinitions ;

            ParameterFieldDefinition crParameterFieldDefinition ;

            ParameterValues crParameterValues = new ParameterValues();

            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

             crParameterDiscreteValue.Value = textBox1.Text;

            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;

            crParameterFieldDefinition = crParameterFieldDefinitions["Customername"];

            crParameterValues = crParameterFieldDefinition.CurrentValues;

             crParameterValues.Clear();

            crParameterValues.Add(crParameterDiscreteValue);

            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

             crystalReportViewer1.ReportSource = cryRpt;

            crystalReportViewer1.Refresh(); 

         }

use like that no need to use cryrtp.load method

private void button1_Click(object sender, EventArgs e)

        {             ReportDocument cryRpt = new ReportDocument();

                         ParameterFieldDefinitions crParameterFieldDefinitions ;

            ParameterFieldDefinition crParameterFieldDefinition ;

            ParameterValues crParameterValues = new ParameterValues();

            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

             crParameterDiscreteValue.Value = textBox1.Text;

            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;

            crParameterFieldDefinition = crParameterFieldDefinitions["Customername"];

            crParameterValues = crParameterFieldDefinition.CurrentValues;

             crParameterValues.Clear();

            crParameterValues.Add(crParameterDiscreteValue);

            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

             crystalReportViewer1.ReportSource = cryRpt;

            crystalReportViewer1.Refresh(); 

         }