Working with GridJs Server Side

Working with GridJs Server Side

0. set the right folder path in Config

Config.FileCacheDirectory for the workbook cache file. Config.PictureCacheDirectory for the image files cache in the workbook.

for the storage detail ,please check this guide

1. Implement GridCacheForStream

For local file storage ,here is an example:

  public class LocalFileCache  : GridCacheForStream
    {

        /// <summary>
        /// Implement this method to savecache,save the stream to the cache object with the key id.
        /// </summary>
        /// <param name="s">the source stream </param>
        /// <param name="uid">he key id.</param>
        public override void SaveStream(Stream s, String uid)
        {
            String filepath = Path.Combine(Config.FileCacheDirectory + Path.DirectorySeparatorChar + "streamcache", uid.Replace('/', '.'));
            using (FileStream fs = new FileStream(filepath, FileMode.Create))
            {
                s.Position = 0;
                s.CopyTo(fs);
            }

        }

        /// <summary>
        /// Implement this method to loadcache with the key uid,return the stream from the cache object.
        /// </summary>
        /// <param name="uid">the key id</param>
        /// <returns>the stream from  the cache</returns>
        public override Stream LoadStream(String uid)
        {
            String filepath = Path.Combine(Config.FileCacheDirectory + Path.DirectorySeparatorChar + "streamcache", uid.Replace('/', '.'));
            FileStream fs = new FileStream(filepath, FileMode.Open);
            return fs;
        }
        /// <summary>
        ///  implement the url in action controller  to get the file
        /// </summary>
        /// <param name="uid">the key id</param>
        /// <returns></returns>
        public override String GetFileUrl(string uid)
        {
            return "/GridJs2/GetFile?id=" + uid;
        }

    }

For server side storage,we also provide an example. Please check: https://github.com/aspose-cells/Aspose.Cells-for-.NET/blob/master/Examples_GridJs/Models/AwsCache.cs

2. Get json from the spreadsheet file.

GridJsWorkbook wbj = new GridJsWorkbook();
using (FileStream fs = new FileStream(path, FileMode.Open))
{
    wbj.ImportExcelFile(fs,GridJsWorkbook.GetGridLoadFormat(Path.GetExtension(path)));
}
String ret =wbj.ExportToJson();

3. Get the images/shapes from the spreadsheet file

//Gridjs will automatically zip all the images/shapes into a zip stream  and store it in cache using the cache implemention.
//GridJsWorkbook.CacheImp.SaveStream(zipoutStream, fileid);

//get the fileid in the cache,uid is the unique id for the spreadsheet  instance, sheetid is the sheet index,
String fileid=(uniqueid + "." + (sheetid + '_batch.zip'))

//get the zip file stream by the fileid
Stream s=GridJsWorkbook.CacheImp.LoadStream(fileid), mimeType, fileid.Replace('/', '.')

4. Update spreadsheet file in cache

GridJsWorkbook gwb = new GridJsWorkbook();
//p is the update json,uid is the unique id for the spreadsheet
String ret = gwb.UpdateCell(p, uid);

5. Save spreadsheet file in cache

GridJsWorkbook wb = new GridJsWorkbook();
//p is the update json,uid is the unique id for the spreadsheet
wb.MergeExcelFileFromJson(uid, p);
wb.SaveToCacheWithFileName(uid, filename,password);

For detail info ,you can check the example here: https://github.com/aspose-cells/Aspose.Cells-for-.NET/tree/master/Examples_GridJs