Im creating a web form app where the user clicks the print button and instantly prints the RDLC file connected to the BtnOnClick method in form but it gives me this error
ReportProcessingException: Unable to create data reader for dataset'Barcode1'
It worked perfectly fine until i added datasets to my rdlc to print out barcodes
forms1
using Microsoft.Reporting.WinForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace PrintToPrinter
{
public partial class Form1 : Form
{
object sender;
EventArgs e;
public Form1()
{
InitializeComponent();
barcodeTxt.Text = "3kg";//change text here
if (barcodeTxt.Text != null)
{
button1_Click(sender,e);
}
}
private void btnPrint_Click(object sender, EventArgs e)
{
LocalReport localReport = new LocalReport();
localReport.ReportPath = Application.StartupPath + "\\SetItemReport.rdlc";
localReport.PrintToPrinter();
DataSet ds = new DataSet();
ReportDataSource barcodeData = new ReportDataSource();
barcodeData.Name = "Barcode1";
barcodeData.Value = ds.Tables["BarcodeData"];
localReport.DataSources.Add(barcodeData);
localReport.Refresh();
}
private void button1_Click(object sender, EventArgs e)
{
BarcodeLib.Barcode barcode = new BarcodeLib.Barcode();
Image img = barcode.Encode(BarcodeLib.TYPE.CODE128, barcodeTxt.Text, Color.Black, Color.White, 100, 30);
pictureBox1.Image = img;
this.barcodeData1.Clear();
using (MemoryStream ms = new MemoryStream())
{
img.Save(ms, ImageFormat.Png);
this.barcodeData1.Barcode1.AddBarcode1Row(barcodeTxt.Text, ms.ToArray());
}
using (frmReport frm = new frmReport(this.barcodeData1.Barcode1))
{
frm.ShowDialog();
}
}
}
}
LocalReportExtentsion(PrintToPrinterClass)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Printing;
using System.IO;
using System.Windows.Forms;
using Microsoft.Reporting.WinForms;
namespace PrintToPrinter
{
public static class LocalReportExtensionscs
{
public static void PrintToPrinter(this LocalReport report)
{
var pageSettings = new PageSettings();
pageSettings.PaperSize = report.GetDefaultPageSettings().PaperSize;
pageSettings.Landscape = report.GetDefaultPageSettings().IsLandscape;
pageSettings.Margins = report.GetDefaultPageSettings().Margins;
pageSettings.Landscape = true;
Print(report, pageSettings);
}
public static void Print(this LocalReport report, PageSettings pageSettings)
{
string deviceInfo =
$@"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>{pageSettings.PaperSize.Width * 100}in</PageWidth>
<PageHeight>{pageSettings.PaperSize.Height * 100}in</PageHeight>
<MarginTop>{pageSettings.Margins.Top * 100}in</MarginTop>
<MarginLeft>{pageSettings.Margins.Left * 100}in</MarginLeft>
<MarginRight>{pageSettings.Margins.Right * 100}in</MarginRight>
<MarginBottom>{pageSettings.Margins.Bottom * 100}in</MarginBottom>
</DeviceInfo>";
Warning[] warnings;
var streams = new List<Stream>();
var currentPageIndex = 0;
Error is thrown here -->
**report.Render("Image", deviceInfo,
(name, fileNameExtension, encoding, mimeType, willSeek) =>
{
var stream = new MemoryStream();
streams.Add(stream);
return stream;
}, out warnings);**
foreach (Stream stream in streams)
stream.Position = 0;
if (streams == null || streams.Count == 0)
throw new Exception("Error: no stream to print.");
var printDocument = new PrintDocument();
printDocument.DefaultPageSettings = pageSettings;
if (!printDocument.PrinterSettings.IsValid)
throw new Exception("Error: cannot find the default printer.");
else
{
printDocument.PrintPage += (sender, e) =>
{
Metafile pageImage = new Metafile(streams[currentPageIndex]);
Rectangle adjustedRect = new Rectangle(
e.PageBounds.Left - (int)e.PageSettings.HardMarginX,
e.PageBounds.Top - (int)e.PageSettings.HardMarginY,
e.PageBounds.Width,
e.PageBounds.Height);
e.Graphics.FillRectangle(Brushes.White, adjustedRect);
e.Graphics.DrawImage(pageImage, adjustedRect);
currentPageIndex++;
e.HasMorePages = (currentPageIndex < streams.Count);
e.Graphics.DrawRectangle(Pens.Red, adjustedRect);
};
printDocument.EndPrint += (Sender, e) =>
{
if (streams != null)
{
foreach (Stream stream in streams)
stream.Close();
streams = null;
}
};
printDocument.Print();
}
}
}
}
The error
Error LocalReportExtensionscs.cs:line 43
Erro LocalReportExtensionscs.cs:line 24
Form1.cs:line 36
at PrintToPrinter.Program.Main() in Program.cs:line 19
This exception was originally thrown at this call stack:
[External Code]
