C# DataGridView 单元格按钮点击事件CellContentClick

this.gridAttachFiles.CellContentClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.gridAttachFiles_CellContentClick);

 private void gridAttachFiles_CellContentClick(object sender, DataGridViewCellEventArgs e)
 {
     //点击button按钮事件
     if (gridAttachFiles.Columns[e.ColumnIndex].Name == "btnOpenFile" && e.RowIndex >= 0)
     {
         //当前行
         var file = gridAttachFiles.Rows[e.RowIndex].DataBoundItem as WorkflowNodeFiles;
         if (file != null)
         {
             if (ImageHelper.IsImageType(file.FileType))
             {
                 var image = ImageHelper.FromBytes(file.FileData);
                 frmPictureViewer.ShowImage(image);
             }
             else
             {
                 FileHelper.OpenFile(file.FileName, file.FileType, file.FileData);
             }
         }
     }
 }