Read data from text file and Populate the data into table

[Former Member]

Hello all,

I have to read a .txt file and populate that data into a table.

For example: if i read names from .txt file , those names should be populated in the Table.

Good Answers are awarded with points.

Thanks,

Arpitha

[Former Member]

<b>Hi

i can explain you to read data from Excel file

First You have to download the jxl.jar file. You can get this file from the Below site

<a href="http://www.andykhan.com/jexcelapi/download.html">JExcelApi v2.6.4 (1747kbytes)</a>

It will be in Compressed Fromat So Unzip it to get the Contents

After Unzipping The File You will get a Folder (jexcelapi/jxl.jar)

Now in NWDS open web dynpro explorer, Right Click Your Project, a popup menu will appear and in that click Properties

You will get window displaying your Project Properties

On Left Side of the window You Will Find "Java Build Path"

Click That "Java Build Path" and you will get 4 Tabs Showing ( Source,Projects,Libraries,Order and Export)

Click Libraries Tab

You will find options many options buttons

In that click the Button "Add External Jars"

You will get Window in order to fecth the jxl.jar file from the location you had stored

After selecting the jxl.jar i will get displayed and click ok

Now Open Navigator

Open Your Project

You will find Lib folder

Copy the jxl.jar to that lib folder

Note : You cannot Read the Content from the excel file directly

First You Have to copy that file to the Server,

And from the Server you can get the file absolute path

With the absolute path you can read the contents of the Excel file

You have to save the Excel file as .xls Format and Not as xlsx format i will not accept that...

You have Upload the Excel file from the Server Using the File Upload UI Element

This Coding will extract 3 columns from the Xls File

Coding

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
 
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
 
import com.sap.fileupload.wdp.IPrivateFileUpload_View;
import com.sap.tc.webdynpro.services.sal.datatransport.api.IWDResource;
 
public void onActionUpload_File(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
  {
    //@@begin onActionUpload_File(ServerEvent)
    IPrivateFileUpload_View.IContextElement element1 = wdContext.currentContextElement();
    IWDResource resource = element1.getFileResource();
    element1.setFileName(resource.getResourceName());
    element1.setFileExtension(resource.getResourceType().getFileExtension());
    //@@end
  }
 
public void onActionUpload_File_in_Server(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
  {
    //@@begin onActionUpload_File_in_Server(ServerEvent)
    InputStream text=null;
    int temp=0;
    try
    {
    	File file = new File(wdContext.currentContextElement().getFileResource().getResourceName().toString());
    	FileOutputStream op = new FileOutputStream(file);
    	
    	if(wdContext.currentContextElement().getFileResource()!=null)
    	{
    		text=wdContext.currentContextElement().getFileResource().read(false);
    		while((temp=text.read())!=-1)
    		{
    			op.write(temp);    			    			
    		}
    	}
    	op.flush();
    	op.close();
    	path = file.getAbsolutePath();
    	wdComponentAPI.getMessageManager().reportSuccess(path); 
    }
 
    catch(Exception e)
    {
    	e.printStackTrace();
    }
    //@@end
  }
 
public void onActionUpload_Data_into_Table(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
  {
    //@@begin onActionUpload_Data_into_Table(ServerEvent)
    try
    {
		Workbook wb =Workbook.getWorkbook(new File(path));
		Sheet sh = wb.getSheet(0);
		
		//wdComponentAPI.getMessageManager().reportSuccess("Columns = "+sh.getColumns());
		//wdComponentAPI.getMessageManager().reportSuccess("Rows = "+sh.getRows());
		
		int columns = sh.getColumns();
		int rows = sh.getRows();
		int i=0;
    	for(int j=1;j<=rows;j++)
    	{
		    	ele=wdContext.nodeTable_Data().createTable_DataElement();
		    
		    	Cell c1 = sh.getCell(i,j);
		   	ele.setTab_Name(c1.getContents());
		    			    	
		    	Cell c2 = sh.getCell(i+1,j);
		    	ele.setTab_Degree(c2.getContents());
		    
		       	Cell c3 = sh.getCell(i+2,j);
		    	ele.setTab_Percentage(c3.getContents());
		    		    	
		    	wdContext.nodeTable_Data().addElement(ele);
		}
		
    }
    catch(Exception ex)
    {
    	wdComponentAPI.getMessageManager().reportSuccess(ex.toString());
    }
    //@@end
  }
 
 
/*
   * The following code section can be used for any Java code that is 
   * not to be visible to other controllers/views or that contains constructs
   * currently not supported directly by Web Dynpro (such as inner classes or
   * member variables etc.). </p>
   *
   * Note: The content of this section is in no way managed/controlled
   * by the Web Dynpro Designtime or the Web Dynpro Runtime. 
   */
  //@@begin others
  String path;
  IPrivateFileUpload_View.ITable_DataElement ele;
//@@end

Regards

Chandran S</b>

[Former Member]

hi Ashwani,

BUt when i am trying to read the file, FileNotFound Exception is being thrown. Can i store my .txt file in C drive of my desktop. and what will the path name?

[former_member186016]

Copy the txt file to following folder in your project:

src/packages/<component-package>/

Hence if you have component Comp1 under package com.test.comps

Put the file in src/packages/com/sap/comps/Comp1/

Rebundle the archive and deploy it again to the server.

In this tutorial you will see how you can add it:

http://help.sap.com/saphelp_nw04/helpdata/en/9e/093aeec9b8634789fa07b3301f1a44/frameset.htm

Regards,

Ashwani Kr Sharma

[former_member186016]

This is a very frequent question on forum.

Refer to this thread:

Also refer to this sample application:

http://help.sap.com/saphelp_nw04/helpdata/en/9e/093aeec9b8634789fa07b3301f1a44/frameset.htm

It reads data from a properties file.

Regards,

Ashwani Kr Sharma