I am getting Exception for substringWithRange:range in below method.
I am having textview with editing disabled.
i am using textfield only for text selection.
when i am selecting text for firs time no exception but when i press for second time it throughs.
Exception:
'NSRangeException', reason: '* -[NSCFString substringWithRange:]: Range or index out of bounds'.
- (void)textViewDidChangeSelection:(UITextView *)textView {
NSRange range = [tv selectedRange];
str = [tv.text substringWithRange:range];
}
I've checked your example. Sometimes you retrieve an undefined range like (2147483647, 0). So, check it to avoid crashes:
- (void)textViewDidChangeSelection:(UITextView *)textView {
NSRange range = [textView selectedRange];
if(range.length == 0 || range.location > textView.text.length)
return;
NSString *str = [textView.text substringWithRange:range];
}
Related
I am creating a Groovy script to export tables from an .xlsm file to a .csv file including formulas when appropriate (rather than generated data). When the script calls .getCellType() on the current cell I get a null pointer exception, even though this functionality occurs within an if statement that tests whether the cell is null.
I have tried replacing the
if(cell != null)
condition with
if(cell.getCellType() != CellType.BLANK)
to no avail.
The code and full error message are below.
#!/usr/bin/env groovy
#Grab(group = 'org.apache.poi', module = 'poi', version = '4.1.0')
#Grab(group = 'org.apache.poi', module = 'poi-ooxml', version = '4.1.0')
import org.apache.poi.xssf.usermodel.XSSFWorkbook
import org.apache.poi.xssf.usermodel.*
import org.apache.poi.ss.usermodel.*
Workbook wb = new XSSFWorkbook("input.xlsm")
FormulaEvaluator fe = wb.getCreationHelper().createFormulaEvaluator()
DataFormatter formatter = new DataFormatter()
PrintStream out = new PrintStream(new FileOutputStream("output.csv"), true, "UTF-8")
byte[] bom = [(byte)0xEF, (byte)0xBB, (byte)0xBF]
out.write(bom)
for (Sheet sheet : wb){
for (Row row : sheet) {
boolean firstCell = true
for(Cell cell : row){
if (! firstCell) out.print(',')
if ( cell != null ) {
if (fe != null) cell = fe.evaluateInCell()
String value = formatter.formatCellValue(cell)
if (cell.getCellType() == CellType.FORMULA) {
value = "=" + value
}
out.print(value)
}
firstCell = false
}
out.println()
}
}
Error Message:
Caught: java.lang.NullPointerException: Cannot invoke method
getCellType() on null object java.lang.NullPointerException:
Cannot invoke method getCellType() on null object
at ExcelToCSV.run(ExcelToCSV.groovy:28)
My expectation is that in the case that the current cell is not null, if the cell is evaluated to contain a formula, the string output to the .csv file will have an "=" appended to the beginning of it, otherwise it will simply output the string representing the value within the cell.
I am unfortunately having problems with my IDE skipping over breakpoints and currently I am unable to step through the code or view the variable values, which is a separate issue I am also working on. Until I get that resolved, I am hoping someone is able to point out what I might be missing.
You are assigning to cell after the null check, but before you call a cell method. That assignment must be a null value.
evaluateInCell takes an argument of type Cell, so if you replace your line
if (fe != null) cell = fe.evaluateInCell()
// cell == null
with
if (fe != null) cell = fe.evaluateInCell(cell)
then you get what the javadocs say you should get, which is the unchanged cell for simple values or the formula result for formulas.
I think you will also find that the Cell type will change to reflect the type of the value returned by the formula evaluation, so your test for CellType.FORMULA will always be false.
I'm working on a project in Spring using SpringMVC. I'm importing data from (.xls) files .
the problem is that:
I'm reading this value "945854955" as a String but saved in DB as "9.45854955E8"
this value "26929" saved as "26929.0"
this value "21/05/1987" saved as "31918.0"
/read Code
// import ...
#RequestMapping(value="/read")
public String Read(Model model,#RequestParam CommonsMultipartFile[] fileUpload)
throws IOException, EncryptedDocumentException, InvalidFormatException {
List<String> liste = new ArrayList();
Employe employe = new Employe();
String modelnom = null;
liste = extraire(modelnom); //See the second code
for (int m=0, i=29;i<liste.size();i=i+29) {
if(i % 29 == 0) {
m++;
}
employe.setNomEmploye(liste.get(29*m+1));
//...
employe.setDateNaissance((String)liste.get(29*m+8).toString()); // here i had the date problem
employe.setDateEntree((String)liste.get(29*m+9).toString()); // here i had the date problem
employe.setDateSortie((String)liste.get(29*m+10).toString()); // here i had the date problem
// ...
employe.setNumCpteBanc(liste.get(29*m+17)); // here i had the first & second case problem
employe.setNumCIMR(liste.get(29*m+19)); // here i had the first & second case problem
employe.setNumMUT(liste.get(29*m+20)); // here i had the first & second case problem
employe.setNumCNSS(liste.get(29*m+21)); // here i had the first & second case problem
boolean bool=true;
List<Employe> employes = dbE.getAll();// liste des employes
for (int n=0;n<employes.size();n++) {
if (employes.get(n).getMatriculeMY() == (int)mat ) {
bool= false;
}
}
if (bool) {
dbE.create(employe);
}
}
return "redirect";
}
extraire code
private List<String> extraire (String nomFichier) throws IOException {
List<String> liste = new ArrayList();
FileInputStream fis = new FileInputStream(new File(nomFichier));
HSSFWorkbook workbook = new HSSFWorkbook(fis);
HSSFSheet spreadsheet = workbook.getSheetAt(0);
Iterator < Row > rowIterator = null;
// recup une ligne
rowIterator = spreadsheet.iterator();
while (rowIterator.hasNext()) {
int i = 0;
row = (HSSFRow) rowIterator.next();
Iterator < Cell > cellIterator = row.cellIterator();
while ( cellIterator.hasNext()) {
Cell cell = cellIterator.next();
i++;
/**
* Pour verifier si une ligne est vide. (for verifing if the line is empty)
*/
if (i % 29 == 0 || i == 1) {
while ( cellIterator.hasNext() && cell.getCellType() == Cell.CELL_TYPE_BLANK) {
cell = cellIterator.next();
}
}
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
String cellule = String.valueOf(cell.getNumericCellValue());
liste.add(cellule);
break;
case Cell.CELL_TYPE_STRING:
liste.add(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BLANK:
cellule = " ";
liste.add(cellule);
break;
}
}
}
fis.close();
return liste;
}
}
Excel's tries to data type cells and sometimes when you explicitly specify the data type Excel may try and cast the cell. You can try to right click on the cell and select 'Format Cell', then select 'Text' as the type (Category). However, at parse time it may still get hosed up.
Your quickest solution might be to save the file as a CSV and use that. You can still edit it in Excel. Although you will need to do some validation to ensure Excel isn't trying to do the above conversions on CSV save as. There are a lot of good Java CSV parsers out there OpenCSV, Super CSV.
The most time consuming, but probably the most correct way, if you want to continue to use Excel, is build a middle ware layer that parses the row and correctly identifies and formats the cell values. Apache POI and HSSF & XSSF can be used. Be warned that to handle xls and xlsx requires two different sets of libraries and often enough abstraction to handle both.
See https://poi.apache.org/spreadsheet/
As an Example:
protected String getCellValue(final Cell cell){
if (null == cell) { return null; }
// For Excel binaries 97 and below, The method of setting the cell type to CELL_TYPE_STRING converts the
// Formatted to date to a short. To correct this we check that the cell type is numeric and the check that it is
// date formatted. If we don't check that it is Numeric first an IllegalAccessorException is thrown.
if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC && isCellDateFormated(cell) {
// isCellDateFormated is seperate util function to look at the cell value in order to determine if the date is formatted as a double.
// is a date format.
return // do date format procedure.
}
cell.setTypeCell(Cell.CELL_TYPE_STRING);
return cell.toString();
}
Hope this helps.
============Update==================
Instead of calling methods like "getNumericCellValue()" try setting the cell type to String and using toString like the example above. Here is my test code.
Note the xls file has one row and 4 cells in csv: "abba,1,211,q123,11.22"
public void testExtract() throws Exception{
InputStream is = new FileInputStream("/path/to/project/Test/src/test/java/excelTest.xls");
HSSFWorkbook wb = new HSSFWorkbook(is);
HSSFSheet sheet = wb.getSheetAt(0);
Iterator<Row> rowIter = sheet.iterator();
while (rowIter.hasNext()){
HSSFRow row = (HSSFRow) rowIter.next();
Iterator<Cell> cellIter = row.cellIterator();
while (cellIter.hasNext()){
Cell cell = cellIter.next();
System.out.println("Raw to string: " + cell.toString());
// Check for data format here. If you set a date cell to string and to string the response the output is funky.
cell.setCellType(Cell.CELL_TYPE_STRING);
System.out.println("Formatted to string: " + cell.toString());
}
}
is.close();
}
Output is
Raw to string: abba
Formatted to string: abba
Raw to string: 1.0
Formatted to string: 1
Raw to string: 211.0
Formatted to string: 211
Raw to string: q1123
Formatted to string: q1123
Raw to string: 11.22
Formatted to string: 11.22
I'm trying to get value from NStableView (i mean the core data value).
I read this: get value of selected row NSTableView
But i can't understand when this will be called?
i did the following:
- (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex
{
NSInteger row = [contragentsView selectedRow];
NSTableColumn *column = [contragentsView tableColumnWithIdentifier:#"name"];
NSCell *cell = [column dataCellForRow:row];
NSLog(#"cell value:%#", [cell stringValue]);
return 0;
}
but i don't know when this will be called.I nee to get the info when a button is clicked!
I have a spinner I'm populating from the database. I want to choose which item from the list is selected by default. I need to find out what item in the list (CursorAdapter) has the value "Default Away" and set that to the selected value.
Spinner away_team_spinner = (Spinner)findViewById(R.id.away_team_spinner);
DatabaseHelper db = new DatabaseHelper(this);
Cursor team_list = db.getTeams(p_game_level);
startManagingCursor(team_list);
String[] team_name = new String[]{colTeamName};
int[] to = new int[]{android.R.id.text1};
SimpleCursorAdapter adapter =
new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, team_list, team_name, to );
adapter.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item );
away_team_spinner.setAdapter(adapter);
//// HERE IS WHERE MY ERRORS START ////
Log.i("NEW_GAME","Before set arrayadapter");
CursorAdapter adapter_choose = (CursorAdapter)away_team_spinner.getAdapter();
Log.i("NEW_GAME","Before set setSelection");
away_team_spinner.setSelection(adapter_choose.getPosition("Default Away"));
This is the "solution" I found by searching on this web site. However, I cannot use "getPosition" with CursorAdapter object. I tried ArrayAdapter, but then the line after "Before set arrayadapter" comment errors with "android.widget.SimpleCursorAdapter cannot be cast to android.widget.ArrayAdapter". What am I doing wrong? Thanks.
have you thought about running a for loop until you find the position then set the adapter position that way? ill draft up some code then test it, i'm doing something similar
and well this just did the trick, enjoy!
int cpos = 0;
for(int i = 0; i < simpleCursorAdapter.getCount(); i++){
cursor.moveToPosition(i);
String temp = cursor.getString((your column index, an int));
if ( temp.contentEquals(yourString)){
Log.d("TAG", "Found match");
cpos = i;
break;
}
}
spinner.setSelection(cpos);
I need to read data from a single worksheet in an Excel 2007 workbook using the Open XML SDK 2.0. I have spent a lot of time searching for basic guidelines to doing this, but I have only found help on creating spreadsheets.
How do I iterate rows in a worksheet and then iterate the cells in each row, using this SDK?
The other answer seemed more like a meta-answer. I have been struggling with this since using LINQ does work with separated document parts. The following code includes a wrapper function to get the value from a Cell, resolving any possible string lookups.
public void ExcelDocTest()
{
Debug.WriteLine("Running through sheet.");
int rowsComplete = 0;
using (SpreadsheetDocument spreadsheetDocument =
SpreadsheetDocument.Open(#"path\to\Spreadsheet.xlsx", false))
{
WorkbookPart workBookPart = spreadsheetDocument.WorkbookPart;
foreach (Sheet s in workBookPart.Workbook.Descendants<Sheet>())
{
WorksheetPart wsPart = workBookPart.GetPartById(s.Id) as WorksheetPart;
Debug.WriteLine("Worksheet {1}:{2} - id({0}) {3}", s.Id, s.SheetId, s.Name,
wsPart == null ? "NOT FOUND!" : "found.");
if (wsPart == null)
{
continue;
}
Row[] rows = wsPart.Worksheet.Descendants<Row>().ToArray();
//assumes the first row contains column names
foreach (Row row in wsPart.Worksheet.Descendants<Row>())
{
rowsComplete++;
bool emptyRow = true;
List<object> rowData = new List<object>();
string value;
foreach (Cell c in row.Elements<Cell>())
{
value = GetCellValue(c);
emptyRow = emptyRow && string.IsNullOrWhiteSpace(value);
rowData.Add(value);
}
Debug.WriteLine("Row {0}: {1}", row,
emptyRow ? "EMPTY!" : string.Join(", ", rowData));
}
}
}
Debug.WriteLine("Done, processed {0} rows.", rowsComplete);
}
public static string GetCellValue(Cell cell)
{
if (cell == null)
return null;
if (cell.DataType == null)
return cell.InnerText;
string value = cell.InnerText;
switch (cell.DataType.Value)
{
case CellValues.SharedString:
// For shared strings, look up the value in the shared strings table.
// Get worksheet from cell
OpenXmlElement parent = cell.Parent;
while (parent.Parent != null && parent.Parent != parent
&& string.Compare(parent.LocalName, "worksheet", true) != 0)
{
parent = parent.Parent;
}
if (string.Compare(parent.LocalName, "worksheet", true) != 0)
{
throw new Exception("Unable to find parent worksheet.");
}
Worksheet ws = parent as Worksheet;
SpreadsheetDocument ssDoc = ws.WorksheetPart.OpenXmlPackage as SpreadsheetDocument;
SharedStringTablePart sstPart = ssDoc.WorkbookPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault();
// lookup value in shared string table
if (sstPart != null && sstPart.SharedStringTable != null)
{
value = sstPart.SharedStringTable.ElementAt(int.Parse(value)).InnerText;
}
break;
//this case within a case is copied from msdn.
case CellValues.Boolean:
switch (value)
{
case "0":
value = "FALSE";
break;
default:
value = "TRUE";
break;
}
break;
}
return value;
}
Edit: Thanks #Nitin-Jadhav for the correction to GetCellValue().
The way I do this is with Linq. There are lots of sample around on this subject from using the SDK to just going with pure Open XML (no SDK). Take a look at:
Office Open XML Formats: Retrieving
Excel 2007 Cell Values (uses pure
OpenXML, not SDK, but the concepts
are really close)
Using LINQ to Query Tables in Excel
2007 (uses Open XML SDK, assumes
ListObject)
Reading Data from SpreadsheetML
(probably best "overall introduction"
article)