栅格数据导入引发的COM组件问题

this.openFileDialog1.Filter = "图像数据(*.tif,*.jpg,*.bmp,*.gif)|*.tif;*.jpg;*.bmp;*.gif";
            this.openFileDialog1.Title = "打开影像数据";
            this.openFileDialog1.Multiselect = false;
            string fileName = "";
            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                fileName = this.openFileDialog1.FileName;
                string filepath;
                string file;
                string file1;
                int lastIndex;
                lastIndex = fileName.LastIndexOf(@"");
                filepath = fileName.Substring(0, lastIndex);
                file = fileName.Substring(lastIndex + 1);
                //导入SDE数据库
                rasterWorkspaceEx = workspace as IRasterWorkspaceEx;
                IWorkspaceFactory tifwpf = new RasterWorkspaceFactoryClass();
                IWorkspace tifwp = tifwpf.OpenFromFile(filepath, 0);
                IRasterWorkspace tifrwp = tifwp as IRasterWorkspace;
                IRasterDataset rasterDataset = tifrwp.OpenRasterDataset(file);
                lastIndex = file.LastIndexOf(@".");
                file1 = file.Substring(0, lastIndex);
                imortRasterData(filepath, file, file1);
                MessageBox.Show("导入成功");

不知道怎么解决这个问题，感谢解答！！

你先试着把 filepath这个变量打印出来，看看是什么结果，根据报错感觉上是估计文件没有找到的问题

嗯，你把报错截图或者是复制出来发给我

已经解决了,谢谢!
解决的代码是把

string filepath;
                string file;
                string file1;
                int lastIndex;
                lastIndex = fileName.LastIndexOf(@"");
                filepath = fileName.Substring(0, lastIndex);
                file = fileName.Substring(lastIndex + 1);

改成了

FileInfo fileInfo = new FileInfo(fileName);
                string filepath = fileInfo.DirectoryName;
                string file = fileInfo.Name;