用於工作需要產生Barcode,隨手從網上找了一個DLL(原文地址忘了)
http://files.cnblogs.com/panchunting/barcode_bin.zip
使用非常簡單,只需添加引用,然後編碼如下
using System; using System.Collections.Generic; using System.Drawing; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using BarcodeLib; namespace WebAppBarcode { public partial class GetBarCodeImage : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string strEncode = Request.QueryString["Code"]; CreateImage(strEncode); } private void CreateImage(string Code) { BarcodeLib.Barcode barcode = new BarcodeLib.Barcode() { IncludeLabel = true, Alignment = AlignmentPositions.CENTER, Width = 300, Height = 100, RotateFlipType = RotateFlipType.RotateNoneFlipNone, BackColor = Color.White, ForeColor = Color.Black, }; System.Drawing.Image img = barcode.Encode(TYPE.CODE128B, Code); using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); Response.ClearContent(); Response.ContentType = "image/png"; Response.BinaryWrite(ms.ToArray()); } } } }
調用後台頁面
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace WebAppBarcode { public partial class _Default : Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { imgBarcode.Src = "~/GetBarCodeImage.aspx?Code=" + this.TextBox1.Text; } } }
調用前台代碼
<ol class="round"> <li> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Button ID="Button1" runat="server" Text="Barcode" OnClick="Button1_Click" /> </li> <li> <img id="imgBarcode" runat="server" /> </li> </ol>
最終效果如下
多說一句,img的長度要設長一點,尤其當字符比較長的時候,否則可能掃描槍無法掃出
必須得自己輸一遍 以前有人問過了。。。
定義全局變量?
不太清楚你的要求,
一般在代碼起始處,預編譯的後面,定義全局變量,
或者定義一個靜態變量,如:
static int a;