CacheData

EmfImage.CacheData method

缓存数据并确保不会从底层执行额外的数据加载DataStreamContainer .

public override void CacheData()

例子

此示例显示如何从文件加载 EMF 图像并列出其所有记录。

[C#]

string dir = "c:\\temp\\";

// 使用 Aspose.Imaging.Image.Load 是一种统一的方式来加载包括 WMF 在内的所有类型的图像。
using (Aspose.Imaging.FileFormats.Emf.EmfImage emfImage = (Aspose.Imaging.FileFormats.Emf.EmfImage)Aspose.Imaging.Image.Load(dir + "test.emf"))
{
    // 缓存数据以加载所有记录。
    emfImage.CacheData();
    System.Console.WriteLine("The total number of records: {0}", emfImage.Records.Count);

    // 键是记录类型，值是WMF图像中该类型的记录数。
    System.Collections.Generic.Dictionary<System.Type, int> types =
        new System.Collections.Generic.Dictionary<System.Type, int>();

    // 收集统计信息 
    foreach (Aspose.Imaging.FileFormats.Emf.Emf.Records.EmfRecord obj in emfImage.Records)
    {
        System.Type objType = obj.GetType();
        if (!types.ContainsKey(objType))
        {
            types.Add(objType, 1);
        }
        else
        {
            types[objType]++;
        }
    }

    // 打印统计信息
    System.Console.WriteLine("Record Type                              Count");
    System.Console.WriteLine("----------------------------------------------");
    foreach (System.Collections.Generic.KeyValuePair<System.Type, int> entry in types)
    {
        string objectType = entry.Key.Name;
        string alignmentGap = new string(' ', 40 - objectType.Length);
        System.Console.WriteLine("{0}:{1}{2}", entry.Key.Name, alignmentGap, entry.Value);
    }
}

//输出可能如下所示：
//总记录数：1188
//记录类型计数
//----------------------------------------------------------
//EmfMetafileHeader: 1
//EmfSetBkMode: 1
//EmfSetTextAlign: 1
//EmfSetRop2: 1
//EmfSetWorldTransform: 1
//EmfExtSelectClipRgn: 1
//EmfCreateBrushIndirect: 113
//EmfSelectObject: 240
//EmfCreatePen: 116
//EmfSetPolyFillMode: 1
//EmfBeginPath: 120
//EmfMoveToEx: 122
//EmfPolyBezierTo16: 36
//EmfLineTo: 172
//EmfCloseFigure: 14
//EmfEndPath: 120
//EmfStrokeAndFillPath: 113
//EmfStrokePath: 7
//EmfSetTextColor: 2
//EmfExtCreateFontIndirectW: 2
//EmfExtTextOutW: 2
//EmfStretchBlt: 1
//EmfEof: 1

也可以看看

Width Crop