LabView String StartsWith functionality like in C#?

Hello all,
in C# (.NET) there is a good class: String
There it is possible e.g. to get information, if the string startswith a special substring.
Is there such possibility in LabView? Is there such LabView vi, which offers this functionality? (Some snippet?)
Why I am asking:
I want to create a switch/case-block (case-structure) in labview for this code:
if(string.startswith("XYZ")) step into case1
else if(string.startswith("DEF")) step into case2
BTW:
It would be so nice if anybody could create polymorphic VI with these functions:
(from C# string class)
public object Clone();
public static int Compare(string strA, string strB);
public static int Compare(string strA, string strB, bool ignoreCase);
public static int Compare(string strA, string strB, StringComparison comparisonType);
public static int Compare(string strA, string strB, bool ignoreCase, CultureInfo culture);
public static int Compare(string strA, string strB, CultureInfo culture, CompareOptions options);
public static int Compare(string strA, int indexA, string strB, int indexB, int length);
public static int Compare(string strA, int indexA, string strB, int indexB, int length, bool ignoreCase);
public static int Compare(string strA, int indexA, string strB, int indexB, int length, StringComparison comparisonType);
public static int Compare(string strA, int indexA, string strB, int indexB, int length, bool ignoreCase, CultureInfo culture);
public static int Compare(string strA, int indexA, string strB, int indexB, int length, CultureInfo culture, CompareOptions options);
public static int CompareOrdinal(string strA, string strB);
public static int CompareOrdinal(string strA, int indexA, string strB, int indexB, int length);
public int CompareTo(object value);
public int CompareTo(string strB);
public static string Concat(IEnumerable<string> values);
public static string Concat<T>(IEnumerable<T> values);
public static string Concat(object arg0);
public static string Concat(params object[] args);
public static string Concat(params string[] values);
public static string Concat(object arg0, object arg1);
public static string Concat(string str0, string str1);
public static string Concat(object arg0, object arg1, object arg2);
public static string Concat(string str0, string str1, string str2);
public static string Concat(object arg0, object arg1, object arg2, object arg3);
public static string Concat(string str0, string str1, string str2, string str3);
public bool Contains(string value);
public static string Copy(string str);
public void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count);
public bool EndsWith(string value);
public bool EndsWith(string value, StringComparison comparisonType);
public bool EndsWith(string value, bool ignoreCase, CultureInfo culture);
public override bool Equals(object obj);
public bool Equals(string value);
public static bool Equals(string a, string b);
public bool Equals(string value, StringComparison comparisonType);
public static bool Equals(string a, string b, StringComparison comparisonType);
public static string Format(string format, object arg0);
public static string Format(string format, params object[] args);
public static string Format(IFormatProvider provider, string format, params object[] args);
public static string Format(string format, object arg0, object arg1);
public static string Format(string format, object arg0, object arg1, object arg2);
public CharEnumerator GetEnumerator();
public override int GetHashCode();
public TypeCode GetTypeCode();
public int IndexOf(char value);
public int IndexOf(string value);
public int IndexOf(char value, int startIndex);
public int IndexOf(string value, int startIndex);
public int IndexOf(string value, StringComparison comparisonType);
public int IndexOf(char value, int startIndex, int count);
public int IndexOf(string value, int startIndex, int count);
public int IndexOf(string value, int startIndex, StringComparison comparisonType);
public int IndexOf(string value, int startIndex, int count, StringComparison comparisonType);
public int IndexOfAny(char[] anyOf);
public int IndexOfAny(char[] anyOf, int startIndex);
public int IndexOfAny(char[] anyOf, int startIndex, int count);
public string Insert(int startIndex, string value);
public static string Intern(string str);
public static string IsInterned(string str);
public bool IsNormalized();
public bool IsNormalized(NormalizationForm normalizationForm);
public static bool IsNullOrEmpty(string value);
public static bool IsNullOrWhiteSpace(string value);
public static string Join(string separator, IEnumerable<string> values);
public static string Join<T>(string separator, IEnumerable<T> values);
public static string Join(string separator, params object[] values);
public static string Join(string separator, params string[] value);
public static string Join(string separator, string[] value, int startIndex, int count);
public int LastIndexOf(char value);
public int LastIndexOf(string value);
public int LastIndexOf(char value, int startIndex);
public int LastIndexOf(string value, int startIndex);
public int LastIndexOf(string value, StringComparison comparisonType);
public int LastIndexOf(char value, int startIndex, int count);
public int LastIndexOf(string value, int startIndex, int count);
public int LastIndexOf(string value, int startIndex, StringComparison comparisonType);
public int LastIndexOf(string value, int startIndex, int count, StringComparison comparisonType);
public int LastIndexOfAny(char[] anyOf);
public int LastIndexOfAny(char[] anyOf, int startIndex);
public int LastIndexOfAny(char[] anyOf, int startIndex, int count);
public string Normalize();
public string Normalize(NormalizationForm normalizationForm);
public string PadLeft(int totalWidth);
public string PadLeft(int totalWidth, char paddingChar);
public string PadRight(int totalWidth);
public string PadRight(int totalWidth, char paddingChar);
public string Remove(int startIndex);
public string Remove(int startIndex, int count);
public string Replace(char oldChar, char newChar);
public string Replace(string oldValue, string newValue);
public string[] Split(params char[] separator);
public string[] Split(char[] separator, int count);
public string[] Split(char[] separator, StringSplitOptions options);
public string[] Split(string[] separator, StringSplitOptions options);
public string[] Split(char[] separator, int count, StringSplitOptions options);
public string[] Split(string[] separator, int count, StringSplitOptions options);
public bool StartsWith(string value);
public bool StartsWith(string value, StringComparison comparisonType);
public bool StartsWith(string value, bool ignoreCase, CultureInfo culture);
public string Substring(int startIndex);
public string Substring(int startIndex, int length);
public char[] ToCharArray();
public char[] ToCharArray(int startIndex, int length);
public string ToLower();
public string ToLower(CultureInfo culture);
public string ToLowerInvariant();
public override string ToString();
public string ToString(IFormatProvider provider);
public string ToUpper();
public string ToUpper(CultureInfo culture);
public string ToUpperInvariant();
public string Trim();
public string Trim(params char[] trimChars);
public string TrimEnd(params char[] trimChars);
public string TrimStart(params char[] trimChars);
Eugen Wiebe
Bernstein AG
CLAD - Certified LabView Associate Developer
Solved!
Go to Solution.

Why I am asking:
I want to create a switch/case-block (case-structure) in labview for this code:
This can be done already with the case structure, you can do simple parsing in the case selector, which takes a string as an input.
Type into the case for first case "XYZ....XYZ~"
Type into next case "DEF...DEF~"
Next case is empty string, default.
How does this work:
The "XYZ...XYZ~" matches all strings that start with XYZ and have any ascii value after the ~ is the highest printable 7bit ascii value so this catches all other characters.
Option 2 is parse (there are very good reg expression vi in the string palette) the string and create interger value if a matched then habdle the unique integers in the case structure.
There are so many ways to do it without making a wrapper for the .net string class, I provided a few quick methods
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

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Greg McKaskle wrote:
> The LStrPrintf example works correctly with the "test" string literal because
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> "text". Calling strcpy to move any string to tempStr will cause
> problems because it is copying the string to an uninitialized pointer,
> not to a string buffer. There isn't anything wrong with the LStrPrintf
> call, the damage is already done.
>
> In the moveblock case, the code:
> tempCStr = (char *)&testinstance.test; //since strcpy didn't work, I
> used this way to try to copy the const char* to char*.
>
> doesn't copy the buffer, it just changes a pointer, tempCStr to point to
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>
> I believe the reason that LV cannot see the returned string is that the
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>
> Greg McKaskle
>
> > struct teststrct{
> > ...
> > const char* test;
> > ...
> > };
> >
> > struct teststrct testinstance;
> >
> > typedef struct {
> > ...
> > LStrHandle test
> > ...
> > } TD1;
> >
> > CIN MgErr CINRun(TD1 *testcluster, LVBoolean *Error) {
> >
> > char *tempCStr = NULL;
> >
> > ...
> >
> > strcpy(tempCStr, testinstance.test); // this would cause LabVIEW crash!
> > LStrPrintf(testcluster->test, (CStr) "%s", tempCStr);
> > // but if I assigned tempCStr as tempCStr = "test", the string value
> > "test" could be passed to LabVIEW without any problems.
> >
> > ...
> > }
> >
> > 2. MoveBlock
> >
> > #include "extcode.h"
> > #include "hosttype.h"
> > #include "windows.h"
> >
> > struct teststrct{
> > ...
> > const char* test;
> > ...
> > };
> >
> > struct teststrct testinstance;
> >
> > typedef struct {
> > ...
> > LStrHandle test
> > ...
> > } TD1;
> >
> > CIN MgErr CINRun(TD1 *testcluster, LVBoolean *Error) {
> >
> > char *tempCStr = NULL;
> > int32 len;
> > ...
> >
> > tempCStr = (char *)&testinstance.test; //since strcpy didn't work, I
> > used this way to try to copy the const char* to char*.
> > len = StrLen(tempCStr);
> >
> > if (err = NumericArrayResize(uB, 1L, (UHandle*)&testcluster->test,
> > len))
> > {
> > *Error = LVFALSE;
> > goto out;
> > }
> >
> > MoveBlock(&tempCStr, LStrBuf(*testcluster->test), len); // the string
> > was able to passed to LabVIEE, but it was unreadable.
> > ...
> >
> > out:
> > ...
> >
> > }
> >
> > Did I do anything wrong? Any thougths or suggestions would be very
> > appreciated!

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, sco_reqlinescomplete_v rlc
where rgl.TRXN_DATE BETWEEN to_date('29-AUG-2010') AND to_date('04-SEP-2010')
and rlc.trxn_date BETWEEN to_date('29-AUG-2010') AND to_date('04-SEP-2010')
AND rgl.datesubinv_key = rlc.datesubinv_key(+)
order by rgl.trxn_date, rgl.subinventory
Question: Why would the left outer joins function as a simple join on DATESUBINV_KEY? Do keys on views function differently than keys defined in the data dictionary? If they do how can I make these keys to function like data dictionary keys?

Hi,
The WHERE clause is applied after the outer join is completed. In your example, rows from rgl will be in the result set even if they have no match in rlc. In those cases, all the columns from rlc will be NULL.
Okay, so you have these rows that contain data from rgl but NULLs where the data from rlc was supposed to go. Now it's time to start the WHERE clause. You then apply conditions like this in the WHERE clause:
AND     rlc.trxn_date BETWEEN ...NULL is between anything, so the row that the outer join prodeuced is rejected.
All conditions involivn columns from rlc probably need to be part of the join condition, not the WHERE clause.
For example, in you first query the FROM and WHERE clauses might be:
FROM          sco_reqgrosslines_v      rgl
LEFT OUTER JOIN sco_reqlinescomplete_v rlc ON    rgl.datesubinv_key   = rlc.datesubinv_key
                                        AND   rlc.trxn_date       BETWEEN TO_DATE ( '29-AUG-2010'
                                                                    , 'DD-MON-YYYY'
                                              AND       TO_DATE ( '04-SEP-2010'
                                                          , 'DD-MON-YYYY'
WHERE   rgl.trxn_date     BETWEEN TO_DATE ( '29-AUG-2010'
                         , 'DD-MON-YYYY'
               AND     TO_DATE ( '04-SEP-2010'
                         , 'DD-MON-YYYY'
                         )Always use (at least) two arguments when calling TO_DATE.
Conditions that only involve rgl can be in the WHERE clause, but if any conditions from rlc are in the WHERE clause, then the effect will be the same as an inner join.
There no difference between tables and views (or sub-queries) in this regard: the same thing would happen regardless of whether rgl and rlc were really tables or not.

Does oracle have similar functionality like MsSql "for xml path('')"

Does oracle have similar build in functionality like MsSql “for xml path(‘’)” , or in another word, it can enforce the result set(multiple rows) into ONE line such kind of presentation way.
Thanks in advance. Any help would be greatly appreciated.

Here I would like specify my question mnore clearly,
CREATE TABLE t(
line NUMBER(3),
site VARCHAR2(4),
phase VARCHAR2(5),
test VARCHAR2(25));
INSERT INTO t VALUES (1, '0100', '*','1111111111111111111111111' );
INSERT INTO t VALUES (2, '0100', '=','2222222222222222222222222' );
INSERT INTO t VALUES (3, '0100', '=','3333333333333333333333333' );
INSERT INTO t VALUES (4, '0100', '*','4444444444444444444444444' );
INSERT INTO t VALUES (5, '0100', '=','5555555555555555555555555' );
INSERT INTO t VALUES (6, '0200', '*','6666666666666666666666666' );
Here I want to retrieve the 'line' column information in ONE line way
select line from t I want the result is like '1,2,3,4,5,6'
Any generous help would be greatly appreciated!!!

[SOLVED]:Is it possible to use functions like decode in 'setWhereClause()'?

Hello,
My requirement is that I have 2 poplists - Country and States.
When I select a country,the corresponding states of that country should get populated in the states poplist.
The approach I took is that :
I selected firePartialAction as ActionType in Country poplist. Then I called a function to VOImpl of StatesVO and set the where clause there.
Now I was thinking about using decode as there is no direct connection between the CountryVO and StatesVO.
Is it possible to use functions like decode in 'setWhereClause()'?
For Example:
setWhereClause("DECODE(LOOKUP_TYPE,'XXC_IND_STATES','IND','XXC_US_STATES','US') = :1");
setWhereClauseParam(0,Country);
executeQuery();
When I tried running the page,no error was given but when the country poplist was changed - there is no change in states poplist.
If its not possible to use decode in setWhereClause(), could you please guide me as to how I can write a query to retrieve a value from a table and store it in a variable 'A'- so that I can pass that variable 'A' in setWhereClauseParam function .
Message was edited by:
Anju Susan

That kewl, but for u knowledge u can add anything in ur where clause of query through ur code in Voimpl class. It is even possible to do change entire query, see Voimpl class methods in javadoc.
--Mukul

LabView String StartsWith functionality like in C#?

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