C#下是否有等同fromAcDbTextStyle()的实现方法
Equivalent to fromAcDbTextStyle() under C# (.NET)Issue
Is there any way to use the fromAcDbTextStyle() function in my .NET application?
解答：
One workaround for your issue is to use standard .NET P/Invoke technique. The sample below shows code for importing “fromAcDbTextStyle” in .NET.
[DllImport("acdb18.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl,
EntryPoint = ?fromAcDbTextStyle@@YA?AW4ErrorStatus@Acad@@AAVAcGiTextStyle@@PB_W@Z)]
private static extern ErrorStatus fromAcDbTextStyle(System.IntPtr style, string styleName);
public void getTextStrWidth()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
Editor ed = doc.Editor;
PromptResult pr = ed.GetString("\nEnter a string: ");
if (pr.Status != PromptStatus.OK) return;
using (Transaction Tx = db.TransactionManager.StartTransaction())
{
TextStyleTable TxtStlTbl = Tx.GetObject(db.TextStyleTableId, OpenMode.ForRead) as TextStyleTable;
string styleName = "STANDARD";
if (!TxtStlTbl.Has(styleName))
{
ed.WriteMessage("\nStyle " + styleName + " doesn't exist :(");
return;
}
Autodesk.AutoCAD.GraphicsInterface.TextStyle iStyle = new Autodesk.AutoCAD.GraphicsInterface.TextStyle();
if (fromAcDbTextStyle(iStyle.UnmanagedObject, styleName) == ErrorStatus.OK)
{
Extents2d ex = iStyle.ExtentsBox(pr.StringResult, true, true, null);
double width = ex.MaxPoint.X - ex.MinPoint.X;
double height = ex.MaxPoint.Y - ex.MinPoint.Y;
ed.WriteMessage("\n-Width = " + width.ToString() + "\n-Height = " + height.ToString());
}
}
}
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