包含vb.netdwg的词条
如何用.NET将DWG文件打印为PDF
因为有人问到，所以写了个例子。具体的要求是从.NET(比如C#)里面调用AutoCAD ActiveX API实现后台打印DWG文件为PDF文件，而且要把打印页面的大小设置成和DWG视图的页面的大小一致。当然除了ActiveX API，其它接口，比如ObjectARX和AutoCAD.NET API也支持打印并能实现上述功能的。不过我们今天就限定一下范围，用一用ActiveX API，而且指定产品是AutoCAD 2010吧。
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执行步骤：打开一个dwg文件，用netload加载下面代码所在的.dll文件，再输入命令plottest，就得到输出结果（一个.pdf文件）。
要用到的参考：
AcDbMgd.dll;AcMgd.dll;AutoCAD 2010 Type Library;System.Windows.Forms; AutoCAD/ObjectDBX Common 18.0 Type Library.
VB.NET:
Imports System
Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.Interop
Imports Autodesk.AutoCAD.Interop.Common
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.EditorInput
Autodesk.AutoCAD.Runtime.CommandMethod("Plottest") _
Public Sub PlotToPDF()
Dim activeDoc As Document = Application.DocumentManager.MdiActiveDocument
Dim ThisDrawing As AcadDocument = CType(activeDoc.AcadDocument, AcadDocument)
Dim layout As AcadLayout = ThisDrawing.ActiveLayout
Dim MediaName As String = layout.CanonicalMediaName
If MediaName.Equals("") Then
activeDoc.Editor.WriteMessage("There is no media set for the active layout.")
Return
Else
activeDoc.Editor.WriteMessage(("The media for the active layout is: " + MediaName))
End If
Try
Dim oplot As AcadPlotConfiguration = ThisDrawing.PlotConfigurations.Add("PDF", layout.ModelType)
oplot.PaperUnits = AcPlotPaperUnits.acMillimeters
oplot.StyleSheet = "monochrome.ctb"
oplot.PlotWithPlotStyles = True
oplot.ConfigName = "DWG To PDF.pc3"
oplot.UseStandardScale = True
oplot.StandardScale = AcPlotScale.acScaleToFit
oplot.PlotType = AcPlotType.acExtents
oplot.CenterPlot = True
Dim oMediaNames As Object = layout.GetCanonicalMediaNames
Dim mediaNames As ArrayList = New ArrayList(CType(oMediaNames, String()))
For Each sName As String In mediaNames
If sName.Contains(MediaName) Then
oplot.CanonicalMediaName = sName
layout.CopyFrom(oplot)
layout.PlotRotation = AcPlotRotation.ac0degrees
layout.RefreshPlotDeviceInfo()
ThisDrawing.SetVariable("BACKGROUNDPLOT", 0)
ThisDrawing.Plot.QuietErrorMode = True
ThisDrawing.Plot.PlotToFile("c:/temp/d1.pdf", "DWG To PDF.pc3")
oplot.Delete()
oplot = Nothing
Return
End If
Next
Catch es As System.Exception
System.Windows.Forms.MessageBox.Show(es.ToString)
End Try
End Sub
C#:
using System;
using System.Collections;
using System.Collections.Specialized;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Interop;
using Autodesk.AutoCAD.Interop.Common;
// Define Command "plotTest"
[CommandMethod("plotTest")]
static public void PlotToPDF()
{
Document activeDoc = Application.DocumentManager.MdiActiveDocument;
AcadDocument ThisDrawing = activeDoc.AcadDocument as AcadDocument;
AcadLayout layout = ThisDrawing.ActiveLayout;
String MediaName = layout.CanonicalMediaName;
if (MediaName.Equals(""))
{
activeDoc.Editor.WriteMessage("There is no media set for the active layout.");
return;
}
else
{
activeDoc.Editor.WriteMessage("The media for the active layout is: " + MediaName);
}
try
{
AcadPlotConfiguration oplot = ThisDrawing.PlotConfigurations.Add("PDF", layout.ModelType);
oplot.PaperUnits = AcPlotPaperUnits.acMillimeters;
oplot.StyleSheet = "monochrome.ctb";
oplot.PlotWithPlotStyles = true;
oplot.ConfigName = "DWG To PDF.pc3";
oplot.UseStandardScale = true;
oplot.StandardScale = AcPlotScale.acScaleToFit;
oplot.PlotType = AcPlotType.acExtents;
oplot.CenterPlot = true;
Object oMediaNames = layout.GetCanonicalMediaNames();
ArrayList mediaNames = new ArrayList((string[])oMediaNames);
foreach (String sName in mediaNames)
{
if (sName.Contains(MediaName))
{
oplot.CanonicalMediaName = sName;
layout.CopyFrom(oplot);
layout.PlotRotation = AcPlotRotation.ac0degrees;
layout.RefreshPlotDeviceInfo();
ThisDrawing.SetVariable("BACKGROUNDPLOT", 0);
ThisDrawing.Plot.QuietErrorMode = true;
ThisDrawing.Plot.PlotToFile("c://temp//d1.pdf","DWG To PDF.pc3");
oplot.Delete();
oplot=null;
return;
}
}
}
catch (System.Exception es)
{
System.Windows.Forms.MessageBox.Show(es.ToString());
}
}
输出结果：
VB.NET 如何通过按钮打开AUTOCAD的指定文件
Process.Start(“cad主程序的路径”，“要打开文件的目录”)
比如用记事本打开 c:\1.txt
Process.Start("C:\Windows\notepad.exe", "c:\1.txt")
在vs2012下，vb.net中点击一个按钮，就会打开一个指定位置的cad图形，然后可以在里面画图，
你是要操作cad文件？网上有操作dxf或dwg格式的代码，你看看dxf的格式吧，是明码的。
简单的点线这些好实现，但要尺寸标注或其它的就要麻烦些
如何用vb.net编程在cad图形中插入dwg图块？
Dim ppr As PromptPointResult = ed.GetPoint("请选择插入点：")
Dim pt As Point3d = ppr.Value
utility.WriteToEditor(pt.ToString())
Dim pidBlock As New PIDBlock()
'自己定义的图块类，保存图块的路径和名称
pidBlock.Name = "sample"
pidBlock.Path = blockPath "b_sample.dwg"
Using blkDb As New Database(False, True)
'read drawing
blkDb.ReadDwgFile(pidBlock.Path, System.IO.FileShare.Read, True, Nothing)
blkDb.CloseInput(True)
Using docLock As DocumentLock = doc.LockDocument()
'多文档要先这样，否则报至命错误
Using t As Transaction = doc.TransactionManager.StartTransaction()
'insert it as a new block
Dim idBTR As ObjectId = doc.Database.Insert(pidBlock.Name, blkDb, False)
'create a ref to the block
Dim bt As BlockTable = DirectCast(t.GetObject(doc.Database.BlockTableId, OpenMode.ForRead), BlockTable)
Dim btr As BlockTableRecord = DirectCast(t.GetObject(bt(BlockTableRecord.ModelSpace), OpenMode.ForWrite), BlockTableRecord)
Using bref As New BlockReference(pt, idBTR)
btr.AppendEntity(bref)
t.AddNewlyCreatedDBObject(bref, True)
End Using
t.Commit()
End Using
End Using
End Using
在VB.NET中浏览图片
转换成位图肯定是可以浏览的，WMF文件没试过。
你可以将图片以二进制形式存储在数据库中，如果是SQL Server，对应字段的类型应该是image。
vb.net 禁用第三方 控件滚轮事件
拦截窗口程序消息可以解决
参考 VB王国荣API讲座 讲消息的那章
几个API就可以搞定
本文标题：包含vb.netdwg的词条
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