stylegalleryitemview.cs

一个可读取显示arigis下的severstyle文件的程序.

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace SymbolViewer
{
	/// <summary>
	/// SymbolTransBitmp 的摘要说明。
	/// </summary>
	public class StyleGalleryItemView
	{
		public StyleGalleryItemView()
		{
			//
			// TODO: 在此处添加构造函数逻辑
			//
		}
		/// <summary>
		///  通过符号库中的IStyleGalleryItem 和 IStyleGalleryClass类别生成图片预览
		/// </summary>
		/// <param name="iWidth">宽度</param>
		/// <param name="iHeight">高度</param>
		/// <param name="mStyleGlyCs">IStyleGalleryClass</param>
		/// <param name="mStyleGlyItem">IStyleGalleryItem</param>
		/// <returns></returns>
		public static System.Drawing.Bitmap StyleGalleryItemToBmp(
			int iWidth,
			int iHeight,
			ESRI.ArcGIS.Display.IStyleGalleryClass mStyleGlyCs,
			ESRI.ArcGIS.Display.IStyleGalleryItem  mStyleGlyItem)
		{
			Bitmap bmp = new Bitmap(iWidth,iHeight);
			Graphics gImage = Graphics.FromImage(bmp);
	
			ESRI.ArcGIS.Display.tagRECT rect = new ESRI.ArcGIS.Display.tagRECT();			
			rect.right  = bmp.Width;
			rect.bottom = bmp.Height;
			//生成预览
			System.IntPtr hdc = new IntPtr();
			hdc = gImage.GetHdc();			
			mStyleGlyCs.Preview(mStyleGlyItem.Item,hdc.ToInt32(),ref rect);
			gImage.ReleaseHdc(hdc);
			gImage.Dispose();
			
			return bmp;
			
		}
		/// <summary>
		/// 通过符号库中的IStyleGalleryItem 和 IStyleGalleryClass类别生成图片预览（不指定宽度）
		/// </summary>
		/// <param name="iHeight">高度 (宽度自动调整)</param>
		/// <param name="mStyleGlyCs">IStyleGalleryClass</param>
		/// <param name="mStyleGlyItem">IStyleGalleryItem</param>
		/// <returns></returns>
		public static System.Drawing.Bitmap StyleGalleryItemToBmp(
			int iHeight,
			ESRI.ArcGIS.Display.IStyleGalleryClass mStyleGlyCs,
			ESRI.ArcGIS.Display.IStyleGalleryItem  mStyleGlyItem)
		{
			int iWidth;
			iWidth =(int)(mStyleGlyCs.PreviewRatio * iHeight);
			return StyleGalleryItemToBmp(iWidth,iHeight,mStyleGlyCs,mStyleGlyItem);
		}
	}
}