1

PrintLabel_Test/Form2.cs

@@ -95,7 +95,7 @@ namespace PrintLabel_Test
                 MessageBox.Show(msg);
             }
             else
-                MessageBox.Show("连接成功");
+                MessageBox.Show("连接成功,dpi:"+ zebraManger.PrinterDPI);
         }
 
         private void button5_Click(object sender, EventArgs e)

ZebraPrinterHelper/ZebraManger.cs

@@ -48,6 +48,15 @@ namespace ZebraPrinterHelper
             {
                 try
                 {
+                    if (string.IsNullOrEmpty(ConnectionEndpoint)) {
+
+                        var dl = GetUsbDirectAddress();
+                        if (dl.Count == 0)
+                        {
+                            new Exception("没有找到打印机");
+                        }
+                        ConnectionEndpoint = dl.First().Key;
+                    }
                     return new UsbConnection(ConnectionEndpoint);
                 }
                 catch (Exception e)
@@ -161,8 +170,8 @@ namespace ZebraPrinterHelper
             try
             {
                 ZebraImageI image = ZebraImageFactory.GetImage(bmp);
-                var width = image.Width * (PrinterDPI/203f);
-                var height = image.Height * (PrinterDPI / 203f);
+                var width = image.Width; // * (PrinterDPI/203f);
+                var height = image.Height; // * (PrinterDPI / 203f);
                 printer.PrintImage(image, 0, 0, (int)width, (int)height, false);
                 return true;
             }
@@ -208,6 +217,7 @@ namespace ZebraPrinterHelper
             status =  GetStatus();
             if (status == null)
             {
+                Close();
                 ReTryCount++;
                 if (ReTryCount > 3)
                 {

ZebraPrinterHelper/ZebraPrinterHelper.csproj

@@ -5,7 +5,7 @@
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
     <ProjectGuid>{E4F7AFC7-2F6D-4685-8350-3C05697428EA}</ProjectGuid>
-    <OutputType>Exe</OutputType>
+    <OutputType>Library</OutputType>
     <RootNamespace>ZebraPrinterHelper</RootNamespace>
     <AssemblyName>ZebraPrinterHelper</AssemblyName>
     <TargetFrameworkVersion>v4.7.1</TargetFrameworkVersion>
@@ -33,6 +33,9 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
+  <PropertyGroup>
+    <StartupObject />
+  </PropertyGroup>
   <ItemGroup>
     <Reference Include="SdkApi.Core">
       <HintPath>..\Source\Sdk\SdkApi.Core.dll</HintPath>