AE加载ersi gird数据好难呀～

<P>　大家好，我用ＡＥ９.２加载栅格数据，TIF,BMP,JPG可以加载，但是grid文件却怎么也加载不了，不知道是什么原因，求教．． <BR> CommonDialog1.ShowOpen<BR>   Dim prsd As IRasterDataset<BR>   Dim pWSF As IWorkspaceFactory<BR>   Set pWSF = New RasterWorkspaceFactory<BR>  Dim spath As String<BR>  Dim stitle As String<BR>  stitle = Left(CommonDialog1.FileTitle, Len(CommonDialog1.FileTitle) - 4)<BR>  spath = Left(CommonDialog1.FileName, Len(CommonDialog1.FileName) - Len(CommonDialog1.FileTitle) - 1)<BR>    ' Get RasterWorkspace<BR>   Dim pRasWS As IRasterWorkspace<BR>    Set pRasWS = pWSF.OpenFromFile(spath, 0)<BR>    Set prsd = pRasWS.OpenRasterDataset(CommonDialog1.FileTitle)<BR>   Dim prasterlayer As IRasterLayer<BR>   Set prasterlayer = New RasterLayer<BR>   prasterlayer.CreateFromDataset prsd</P>
<P>   MapControl1.ActiveView.FocusMap.AddLayer prasterlayer<BR>   MapControl1.Refresh</P>

<P>上面可以加载ＴＩＦ．．但是不能加载ＧＲＩＤ，有人说grid文件加载时不要文件名后缀，但还是不行呀～～</P>