为 IDAutomationHC39M 创建 2 位条码但不扫描

Question

我正在尝试为编号 50 或 51 生成 IDAutomationHC39M，生成条形码但在扫描时我无法获得详细编号。

我可以用同样的方法为 14757 创建条形码，在这种情况下我可以正确扫描该条形码。

我应该如何扫描生成的 2 位数条码。

我在下面的代码中做错了什么吗？

public void generateBarcode(int id)
    {
        if (plBarCode != null)
        {
            string barCode = "";

            barCode = Convert.ToString(id);
            System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
            using (Bitmap bitMap = new Bitmap(barCode.Length * 70, 70))
            {
                using (Graphics graphics = Graphics.FromImage(bitMap))
                {
                    Font oFont = new Font("IDAutomationHC39M", 30);
                    PointF point = new PointF(2f, 2f);
                    SolidBrush blackBrush = new SolidBrush(Color.Black);
                    SolidBrush whiteBrush = new SolidBrush(Color.White);
                    graphics.FillRectangle(whiteBrush, 0, 0, bitMap.Width, bitMap.Height);                       
                    int w = barCode.Length * 40;                    
                    Graphics oGraphics = Graphics.FromImage(bitMap);                    
                    PointF oPoint = new PointF(2f, 2f);
                    SolidBrush oBrushWrite = new SolidBrush(Color.Black);
                    SolidBrush oBrush = new SolidBrush(Color.White);         
                    oGraphics.FillRectangle(oBrush, 0, 0, w, 100);                       
                    oGraphics.DrawString("*" + barCode + "*", oFont, oBrushWrite, oPoint);

                }
                using (MemoryStream ms = new MemoryStream())
                {
                    bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                    byte[] byteImage = ms.ToArray();

                    Convert.ToBase64String(byteImage);
                    imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
                }
                plBarCode.Controls.Add(imgBarCode);
            }
        }

    }

生成了以下编号为 56 的条形码，并且还从仍在扫描但未返回数据 56 的传递字符串中删除了 *。

Answer 1

看起来你有 6 个字符。两个“*”字符开始和结束条形码。

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAD/AAAAAAAAAAAAAAABAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAATUoCA+Jw8kAAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/Af//AAABAAAAAAAAAAAAAAD/AAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAajkDAr7LFAwAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAAAAAAAAAAAAP8AAAABAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAARVICA/z3WM0AAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/Af//AAABAAAAAAAAAAAAAAD/AAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAajkDAr7LFAwAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAD/AAAAAAAAAAAAAAABAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAATUoCA+Jw8kAAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/ASL/AADeAAAA/gAAAAIAAAD+AAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAh6QEAZKdo54AAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAD/AAAAAQAAAP8AAAABAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAak4DA7VAmk0AAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/Af//AAAAAAAAAAAAAAEAAAAAAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAUUoCA+juoggAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAD/AAAAAQAAAAAAAAAAAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAATVICAxOyzrMAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/Af//AAABAAAA/wAAAAEAAAD/AAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAizUEAhrxcbgAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/Af//AAAAAAAAAQAAAP8AAAABAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAbkoDA3iPVH4AAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAAAAAAA/wAAAAEAAAAAAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAASVICA62zYxMAAAAASUVORK5CYII=" width="10" height="40"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAACCAQAAADLaIVbAAAANUlEQVQIHQEqANX/AQD/AAD/AAAAAQAAAP8AAAAAAAAAAgAAAAAAAAAAAAAAAAAAAAAAAAAAajUDAvnk9E4AAAAASUVORK5CYII=" width="10" height="40">

当我插入 50 时我得到了这个。看起来你需要删除你在 'DrawString' 方法中的条形码前后添加的两个星号。

这是我添加的图片。

Answer 2

使用此修改后的代码。

public void generateBarcode(string id)
{
                int w = id.Length * 55;

                // Create a bitmap object of the width that we calculated and height of 100
                Bitmap oBitmap = new Bitmap(w, 100);
                // then create a Graphic object for the bitmap we just created.
                Graphics oGraphics = Graphics.FromImage(oBitmap);
                // Now create a Font object for the Barcode Font
                // (in this case the IDAutomationHC39M) of 18 point size
                Font oFont = new Font("IDAutomationHC39M", 18);
                // Let's create the Point and Brushes for the barcode
                PointF oPoint = new PointF(2f, 2f);
                SolidBrush oBrushWrite = new SolidBrush(Color.Black);
                SolidBrush oBrush = new SolidBrush(Color.White);
                // Now lets create the actual barcode image
                // with a rectangle filled with white color
                oGraphics.FillRectangle(oBrush, 0, 0, w, 100);
                // We have to put prefix and sufix of an asterisk (*),
                // in order to be a valid barcode
                oGraphics.DrawString("*" + id + "*", oFont, oBrushWrite, oPoint);
                // Then we send the Graphics with the actual barcode
                System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();

                using (System.IO.FileStream fs = System.IO.File.Open(Server.MapPath("~/img/barcodes/") + id + ".jpg", FileMode.Create))
                {
                    oBitmap.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);

                }
                oBitmap.Dispose();
                imgbarcode.ImageUrl = "~/img/barcodes/"+id+".jpg";
}

Answer 3

您可能想试试这个：

  protected void btnGenerate_Click(object sender, EventArgs e)

    {

        string barCode = txtCode.Text;
        //testbar.Text = txtCode.Text;
        System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();

        using (Bitmap bitMap = new Bitmap(barCode.Length * 28, 90))
        {

            using (Graphics graphics = Graphics.FromImage(bitMap))
            {
                var fonts = new PrivateFontCollection();
                fonts.AddFontFile(Server.MapPath("~/font/IDAutomationHC39M.ttf"));
                Font oFont = new Font((FontFamily)fonts.Families[0], 17f);
                //Font oFont = new Font("IDAutomationHC39M", 10,FontStyle.Regular,GraphicsUnit.Pixel);
                PointF point = new PointF(2f, 2f);
                SolidBrush blackBrush = new SolidBrush(Color.Black);
                SolidBrush whiteBrush = new SolidBrush(Color.White);
                graphics.FillRectangle(whiteBrush, 0, 0, bitMap.Width, bitMap.Height);
                graphics.DrawString("*" + barCode + "*", oFont , blackBrush, point);
            }
            using (MemoryStream ms = new MemoryStream())
            {
                bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                byte[] byteImage = ms.ToArray();

                Convert.ToBase64String(byteImage);
                imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
            }
            plBarCode.Controls.Add(imgBarCode);
        }
    }

为 IDAutomationHC39M 创建 2 位条码但不扫描

Create 2 digit barcode for IDAutomationHC39M but not scanning

c#

asp.net

barcode

barcode-scanner

barcode-printing