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VB.NET Crystal Reports Integer parameter

All Crystal Reports programming samples in this tutorials is based on the following database (crystaldb) . Please take a look at the database structure before you start this tutorial - Click here to see Database Structure .

In this tutorial we are passing an Integer Parameter to Crystal Reports from VB.NET.

In the previous tutorial , we saw passing a string parameter to Crystal Reports from VB.NET and get the result. This is very similar to that tutorial , so here showing only the change information part only. So please take a look at the complete part of passing a string parameter to Crystal Reports from VB.NET.

When we pass an Integer parameter , we have to create a new Integer parameter in the Parameter Fields of Field Explorer. Then we will get the following screen and fill the fields like in the picture .

vb.net_crystal_report_integer_parameter_1.GIF

After creating the parameter field , we have to create the selection formula for the Crystal Reports . For creating selection formula , Right click on Crystal Reports designer window , select REPORT -> SELECTION FORMULA -> RECORD .

Then you can see the record Selection Formula Editor. This for entering the selection formula. For that you have to select the fields from above lists and make the formula .

Here we made the formula like select the records from Product table whose value is greater than the input value. For that first we select the table field that is Product_price from Product table and then we select the comparison operator and finally we select our Parameter we created earlier. Double click each field then it will automatically selected

vb.net_crystal_report_integer_parameter_2.GIF

After the creation of selection formula close that screen .

Now the designing part is over and the next step is to call the created Crystal Reports in VB.NET through Crystal Reports Viewer control .

Select the default form (Form1.vb) you created in VB.NET and drag a Textbox , button and CrystalReportViewer control to your form.

Select Form's source code view and import the following :

Imports CrystalDecisions.CrystalReports.Engine

Imports CrystalDecisions.Shared

Put the following source code in the button click event




Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click

        Dim cryRpt As New ReportDocument
        cryRpt.Load("PUT CRYSTAL REPORT PATH HERE\CrystalReport1.rpt")

        Dim crParameterFieldDefinitions As ParameterFieldDefinitions
        Dim crParameterFieldDefinition As ParameterFieldDefinition
        Dim crParameterValues As New ParameterValues
        Dim crParameterDiscreteValue As New ParameterDiscreteValue

        crParameterDiscreteValue.Value = Convert.ToInt32(TextBox1.Text)
        crParameterFieldDefinitions =  _
				cryRpt.DataDefinition.ParameterFields
        crParameterFieldDefinition =  _ 
				crParameterFieldDefinitions.Item("Price")
        crParameterValues = crParameterFieldDefinition.CurrentValues

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

        CrystalReportViewer1.ReportSource = cryRpt
        CrystalReportViewer1.Refresh()
    End Sub
End Class

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

The Crystal Report is in your project location, there you can see CrystalReport1.rpt . So give the full path name of report here.

Now you can run the program . Enter any price , then you can see the report of the Product list whose price is greater than or equal to the entered price.

vb.net_crystal_report_integer_parameter_3.GIF


Here we got the result of Product list whose price is grater than 50.







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