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Draw QR Code in C# s USING THIRD-PARTY TOOLS AND HAVING FUN WITH RS

CHAPTER 13 s USING THIRD-PARTY TOOLS AND HAVING FUN WITH RS
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1. Right-click an open area in the report designer, and select Properties. 2. In the Properties dialog box select the References tab, and click the add assembly button (the button is labeled with two dots). 3. In the Add Reference dialog box, select Assembly Neodynamic Barcode Professional 4.0. 4. Click the Add button. 5. Click the OK button to finish the process.
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Figure 13-7. Steps to add the reference to the barcode assembly After you finish adding the assembly reference, you will be redirected to the Report Properties dialog box, where you ll notice that the Neodynamic assembly is properly referenced in the report. Now, we need to create an instance of the barcode tool and name it objBarcode. The class reference should be Neodynamic.ReportingServices.Barcode. Please make sure your final report properties look similar to the ones shown in Figure 13-8.
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Figure 13-8. Final look of report references properties As you can see in Figure 13-8, we need to make reference to the barcode assembly to start the integration. Once a reference is established, we need to know which class to use for barcode generation. In this case, we are going to use the Neodynamic.ReportingServices.Barcode class. Before we make a call to this class, we need to instantiate it with the name objBarcode. All right, with the reference setup complete now, let s go ahead and create our custom function GetBarcode, which we need to allow our report to interact with the barcode tool. You can write custom code under the Code tab of the Report Properties dialog box (see Figure 13-9). Please add the following code into the Report Properties Code section: Public Function GetBarcode(ByVal code As String) As Byte() 'Set the value to encode objBarcode.Code = code 'Set the Industrial 2 of 5 Barcode Symbology objBarcode.Symbology = Neodynamic.ReportingServices.Symbology.Industrial2of5 'Set the Bar's height to 20 px objBarcode.BarHeight = 0.2 'Hide the value to encode in the barcode image objBarcode.DisplayCode = False 'Generate the barcode image Return objBarcode.GetBarcodeImagePng() End Function
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Figure 13-9. Custom code to interact with the barcode assembly You might be wondering why the code in Figure 13-9 is inside the report instead of in Form1. The reason is simply that we are making a call to the barcode generation assembly dynamically during the rendering of the report notice that our custom code calls the GetBarcodeImagePng() method from the assembly to return the barcode image in .png format. Let s move on to introduce interactive sorting to the second column, that is, Name. Setting interactive sort is simple; just use the following steps, illustrated in Figure 13-10: 1. Right-click the Name column header, and select Properties. 2. In the Properties dialog box, select the Interactive Sort tab. 3. Click the Add an interactive sort action on this textbox check box. 4. In the Sort expression field, please select =Fields!Name.Value from the list. 5. Click the OK button to finish the process.
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Figure 13-10. Steps to add interactive sorting
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Step 3: Writing the C# Code
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Well, that s all we need on the report design front, so add the following code behind Form1.cs to see the barcode report in action: using using using using using using using using using System; System.Collections.Generic; System.ComponentModel; System.Data; System.Drawing; System.Text; System.Windows.Forms; System.Data.SqlClient; Microsoft.Reporting.WinForms;
namespace Barcode { public partial class Form1 : Form { public Form1() { InitializeComponent(); }
CHAPTER 13 s USING THIRD-PARTY TOOLS AND HAVING FUN WITH RS
private void Form1_Load(object sender, EventArgs e) { //making Neodynamic assembly trusted this.reportViewer1.LocalReport.AddTrustedCodeModuleInCurrentAppDomain( "Neodynamic.ReportingServices.Barcode, Version=4.0.2000.0,Culture=neutral, PublicKeyToken=c6b33c3093a0d4cd"); // connection string string cnString = @"Data Source=(local);Initial Catalog=RealWorld; Integrated Security=SSPI;"; SqlConnection conReport = new SqlConnection(cnString); SqlCommand cmdReport = new SqlCommand(); SqlDataReader drReport; DataSet dsReport = new dsBarcode(); try { // open connection conReport.Open(); cmdReport.CommandType = CommandType.Text; cmdReport.Connection = conReport; // get query string from string builder cmdReport.CommandText = "SELECT * FROM tblBarcode"; // execute query and load result to dataset drReport = cmdReport.ExecuteReader(); dsReport.Tables[0].Load(drReport); // close connection drReport.Close(); conReport.Close(); // prepare report for view reportViewer1.LocalReport.ReportEmbeddedResource = "Barcode.rptBarcode.rdlc"; ReportDataSource rds = new ReportDataSource(); rds.Name = "dsBarcode_dtBarcode"; rds.Value = dsReport.Tables[0]; reportViewer1.LocalReport.DataSources.Add(rds);
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