File upload and download

[stanlee]

hi ,

I want to upload and download the file ,can any one guide me how to do, I searched in showcase no such example is there.I'm not using any framework like structs ,spring ...etc


Regards,
Stanley

[hgaglani]

For upload from SmartGWT, u can use the uploadItem or FileItem inside a DynamicForm and submit it which is sent back to the server as a multipart form.

On the backend you could use the Apache Commons FileUpload API to access the uploaded file. I have a REST backend and it works... so I guess this API works on any server code.

Cheers,
Hetal

[smartgwt.dev]

SmartGWT Enterprise Edition (EE) supports both, upload and download (export) pretty much without any code.

Have a look at the export sample and the file upload sample.

The file upload functionality is very sophisticated and not only does it report data validation errors back to the user, but also allows them to correct the invalid data and resubmit to the server. All this is in-built and no additional coding is required.

[stanlee]

File Upload and download

hi,

thx for reply , but i'm not using smartgwt EE , can you suggest me how to do in smartgwt . Please do the needful .


Regards
Stanley

[sjivan]

See Hetal's response above.

Sanjiv

[stanlee]

File upload and download

hi Hetal,
Thanks for the help , implemented what you have said ,it's worked fine


Regards
Stanley

[ynaik]

For upload from SmartGWT, u can use the uploadItem or FileItem inside a DynamicForm and submit it which is sent back to the server as a multipart form.

On the backend you could use the Apache Commons FileUpload API to access the uploaded file. I have a REST backend and it works... so I guess this API works on any server code.

Cheers,
Hetal

Hi Hetal,

How can I export/download the ListGrid data in csv(Excel) format by just using smart GWT & not smart EE?

I tried to do ListGrid.exportData() but no results

DSRequest dsRequestProperties = new DSRequest();
dsRequestProperties.setExportAs((ExportFormat)EnumUtil.getEnum(ExportFormat.values(), "csv"));
dsRequestProperties.setExportDisplay(ExportDisplay.DOWNLOAD);
listGrid.exportData(dsRequestProperties);

Please suggest.
Thanks,
Yasmeen

[leo82in]

Hi steve,

You've got solution for upload and download the file, ryt?

can you send code for upload and download the file?
Or
What all stepts to be done for the upload and download the file?

Thanks,
Leo

[ynaik]

See Hetal's response above.

Sanjiv

Hi Sanjiv,


How can I export/download the ListGrid data in csv(Excel) format by just using smart GWT & not smart EE?

The following did not work for me.

DSRequest dsRequestProperties = new DSRequest();
dsRequestProperties.setExportAs((ExportFormat)EnumUtil.getEnum(ExportFormat.values(), "csv"));
dsRequestProperties.setExportResults(true);
dsRequestProperties.setExportDisplay(ExportDisplay.DOWNLOAD);
listGrid.exportData(dsRequestProperties);
Please help.

Thanks in advance

[mihai007]

Oh my.. this is the third thread talking about csv export in smartgwt and not EE version....

here I go again:
I created a simple sample that exports a listgrid into csv data. From there you just need to send the string containing csv data to server, etc...
http://forums.smartclient.com/showthread.php?t=6788

[ynaik]

Oh my.. this is the third thread talking about csv export in smartgwt and not EE version....

here I go again:
I created a simple sample that exports a listgrid into csv data. From there you just need to send the string containing csv data to server, etc...
http://forums.smartclient.com/showthread.php?t=6788

Thanks a lot Mihai007.

[ynaik]

Thanks a lot Mihai007.

When to try to write to excel file using APACHE POI at the server side,I get the following exception

Here is the code at GWT RPC ServiceImpl side,

response = getThreadLocalResponse();
response.setContentType("application/vnd.ms-excel");
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("new sheet");

// Write the output
OutputStream out = response.getOutputStream();
wb.write(out);
out.close();


here is the Exception


2009-07-29 13:04:25,659 [ERROR] exportData
com.google.gwt.core.client.JavaScriptException:
(Error): Could not complete the operation due to error c00ce514.
number: -1072896748
description: Could not complete the operation due to error c00ce514.
at com.google.gwt.http.client.XMLHTTPRequest.getResponseText(Native Method)
at com.google.gwt.http.client.Request$1.getText(Request.java:74)
at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:185)
at com.google.gwt.http.client.Request.fireOnResponseReceivedImpl(Request.java:264)
at com.google.gwt.http.client.Request.fireOnResponseReceivedAndCatch(Request.java:236)
at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:227)


Why am i getting this exception

Could not complete the operation due to error c00ce514.



Please help.

[ynaik]

When to try to write to excel file using APACHE POI at the server side,I get the following exception

Here is the code at GWT RPC ServiceImpl side,

response = getThreadLocalResponse();
response.setContentType("application/vnd.ms-excel");
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("new sheet");

// Write the output
OutputStream out = response.getOutputStream();
wb.write(out);
out.close();


here is the Exception


2009-07-29 13:04:25,659 [ERROR] exportData
com.google.gwt.core.client.JavaScriptException:
(Error): Could not complete the operation due to error c00ce514.
number: -1072896748
description: Could not complete the operation due to error c00ce514.
at com.google.gwt.http.client.XMLHTTPRequest.getResponseText(Native Method)
at com.google.gwt.http.client.Request$1.getText(Request.java:74)
at com.google.gwt.user.client.rpc.impl.RequestCallbackAdapter.onResponseReceived(RequestCallbackAdapter.java:185)
at com.google.gwt.http.client.Request.fireOnResponseReceivedImpl(Request.java:264)
at com.google.gwt.http.client.Request.fireOnResponseReceivedAndCatch(Request.java:236)
at com.google.gwt.http.client.Request.fireOnResponseReceived(Request.java:227)


Why am i getting this exception

Could not complete the operation due to error c00ce514.



Please help.

I have written another Servlet that handles that File download, when i test the URL standalone, it works fine, but when i try to invoke using smartGWT , nothing happens, i mean the call is not invoked . This is not thru RPC Manager

code
final DynamicForm form = new DynamicForm();
form.setEncoding(Encoding.MULTIPART);
form.setCanSubmit(true);
form.setAction(GWT.getModuleBaseURL()+"fileServlet");
form.submit();

Please help, How can I invoke a url , response.contentType of FileServlet is "application/vnd.ms-excel" .

[smartgwt.dev]

First, you cannot use GWT-RPC / Ajax to upload / download a file.

Use Fiddler / Firebug to see the URL being invoked when you're using the servlet.

[ynaik]

For upload from SmartGWT, u can use the uploadItem or FileItem inside a DynamicForm and submit it which is sent back to the server as a multipart form.

On the backend you could use the Apache Commons FileUpload API to access the uploaded file. I have a REST backend and it works... so I guess this API works on any server code.

Cheers,
Hetal

Hi Hetal,

How can I populate the smart GWT ListGrid with the data present in the upload file? Please suggest.