Arbeta med GridJs på serversidan

Arbeta med GridJs på serversidan

0. Ange rätt mappväg i Config

Config.FileCacheDirectory för arbetsbokscache-filen. Config.PictureCacheDirectory för bildfilscache i arbetsboken.

För lagringsinformation, se denna guide

1. Implementera GridCacheForStream

För lokal fil lagring, här är ett exempel:

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;
}
}

För serversidans lagring, tillhandahåller vi också ett exempel. Please check: https://github.com/aspose-cells/Aspose.Cells-for-.NET/blob/master/Examples_GridJs/Models/AwsCache.cs

2. Hämta json från kalkylbladet.

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. Hämta bilder/former från kalkylbladet

//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. Uppdatera kalkylbladet i 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. Spara kalkylbladet i 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);

För detaljerad info kan du kolla exemplet här: https://github.com/aspose-cells/Aspose.Cells-for-.NET/tree/master/Examples_GridJs