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C# String Trim() Error!

Hi,

C# Annoying string function or Am I doing Something wrong?

In VB6/VB.NET I can code like:
value = value.trim()

and it just work!
But in c#, I event put in the additional check I still get the error.
if (value.Length > 0 && value != string.Empty){
value = value.trim();
}

The error message:
startIndex cannot be larger than length of string.
Parameter name: startIndex at
System.String.I nternalSubStrin gWithChecks(Int 32 startIndex, Int32
length, Boolean fAlwaysCopy) ...

Please Help!
Thanks.
Regards Dat.
Jun 15 '06 #1
5 15008
Hi Dat,
This code is working fine on my end and I am getting the expected
output.Could u please more elobrate ur problem.

Thanks,
Hitesh
Dat K. AU DUONG wrote:
Hi,

C# Annoying string function or Am I doing Something wrong?

In VB6/VB.NET I can code like:
value = value.trim()

and it just work!
But in c#, I event put in the additional check I still get the error.
if (value.Length > 0 && value != string.Empty){
value = value.trim();
}

The error message:
startIndex cannot be larger than length of string.
Parameter name: startIndex at
System.String.I nternalSubStrin gWithChecks(Int 32 startIndex, Int32
length, Boolean fAlwaysCopy) ...

Please Help!
Thanks.
Regards Dat.


Jun 15 '06 #2
Hi Hitesh,

My code extract data from the mshtml.HTMLElem ent

string value;
mshtml.IHTMLDoc ument2 doc;
mshtml.IHTMLEle mentCollection tbls = (mshtml.IHTMLEl ementCollection )
((mshtml.IHTMLE lementCollectio n) doc.body.all).t ags("table");
mshtml.HTMLTabl e tbl = (mshtml.HTMLTab le) tbls.item(1,1);
mshtml.HTMLTabl eRow tblRow = (mshtml.HTMLTab leRow) tbl.rows.item(1 ,1);

if (tblRow.cells != null)
{
mshtml.IHTMLEle ment tblElement = (mshtml.IHTMLEl ement)
tblRow.Cells.it em(2,2);

value = tblElement.inne rText;

// Error Occur Here!
if (value.Length > 0 && value != string.Empty){
value = value.Trim();
}
}

I think the problem occur when the innerText is Empty and I am trying to
trim the value.

Regards Dat.

hi**********@gm ail.com wrote:
Hi Dat,
This code is working fine on my end and I am getting the expected
output.Could u please more elobrate ur problem.

Thanks,
Hitesh
Dat K. AU DUONG wrote:
Hi,

C# Annoying string function or Am I doing Something wrong?

In VB6/VB.NET I can code like:
value = value.trim()

and it just work!
But in c#, I event put in the additional check I still get the error.
if (value.Length > 0 && value != string.Empty){
value = value.trim();
}

The error message:
startIndex cannot be larger than length of string.
Parameter name: startIndex at
System.String.I nternalSubStrin gWithChecks(Int 32 startIndex, Int32
length, Boolean fAlwaysCopy) ...

Please Help!
Thanks.
Regards Dat.

Jun 15 '06 #3
Dat K. AU DUONG <da*********@sp rusons.com.au> wrote:
Hi Hitesh,

My code extract data from the mshtml.HTMLElem ent

string value;
mshtml.IHTMLDoc ument2 doc;
mshtml.IHTMLEle mentCollection tbls = (mshtml.IHTMLEl ementCollection )
((mshtml.IHTMLE lementCollectio n) doc.body.all).t ags("table");
mshtml.HTMLTabl e tbl = (mshtml.HTMLTab le) tbls.item(1,1);
mshtml.HTMLTabl eRow tblRow = (mshtml.HTMLTab leRow) tbl.rows.item(1 ,1);

if (tblRow.cells != null)
{
mshtml.IHTMLEle ment tblElement = (mshtml.IHTMLEl ement)
tblRow.Cells.it em(2,2);

value = tblElement.inne rText;

// Error Occur Here!
if (value.Length > 0 && value != string.Empty){
value = value.Trim();
}
}

I think the problem occur when the innerText is Empty and I am trying to
trim the value.


I don't think the problem is where you think it is.

Could you post a short but complete program which demonstrates the
problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too
Jun 15 '06 #4
Dear Jon and Hitesh

Thank your!

I have found the problem, it was due to the tblElement that I am
refering to does not exist.

It never occurr to me to think twice whether it could be something else.
Because when I don't put the Trim() statement in it work! (Without
Error/Warning).

That's why I thought it was having to do with the Trim() function.

Thanks again for your time!
Regards Dat.

Jon Skeet [C# MVP] wrote:
Dat K. AU DUONG <da*********@sp rusons.com.au> wrote:
Hi Hitesh,

My code extract data from the mshtml.HTMLElem ent

string value;
mshtml.IHTMLDoc ument2 doc;
mshtml.IHTMLEle mentCollection tbls = (mshtml.IHTMLEl ementCollection )
((mshtml.IHTMLE lementCollectio n) doc.body.all).t ags("table");
mshtml.HTMLTabl e tbl = (mshtml.HTMLTab le) tbls.item(1,1);
mshtml.HTMLTabl eRow tblRow = (mshtml.HTMLTab leRow) tbl.rows.item(1 ,1);

if (tblRow.cells != null)
{
mshtml.IHTMLEle ment tblElement = (mshtml.IHTMLEl ement)
tblRow.Cells.it em(2,2);

value = tblElement.inne rText;

// Error Occur Here!
if (value.Length > 0 && value != string.Empty){
value = value.Trim();
}
}

I think the problem occur when the innerText is Empty and I am trying to
trim the value.


I don't think the problem is where you think it is.

Could you post a short but complete program which demonstrates the
problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.

Jun 15 '06 #5
Wecome Dat

Thanks,
Hitesh
Dat K. AU DUONG wrote:
Dear Jon and Hitesh

Thank your!

I have found the problem, it was due to the tblElement that I am
refering to does not exist.

It never occurr to me to think twice whether it could be something else.
Because when I don't put the Trim() statement in it work! (Without
Error/Warning).

That's why I thought it was having to do with the Trim() function.

Thanks again for your time!
Regards Dat.

Jon Skeet [C# MVP] wrote:
Dat K. AU DUONG <da*********@sp rusons.com.au> wrote:
Hi Hitesh,

My code extract data from the mshtml.HTMLElem ent

string value;
mshtml.IHTMLDoc ument2 doc;
mshtml.IHTMLEle mentCollection tbls = (mshtml.IHTMLEl ementCollection )
((mshtml.IHTMLE lementCollectio n) doc.body.all).t ags("table");
mshtml.HTMLTabl e tbl = (mshtml.HTMLTab le) tbls.item(1,1);
mshtml.HTMLTabl eRow tblRow = (mshtml.HTMLTab leRow) tbl.rows.item(1 ,1);

if (tblRow.cells != null)
{
mshtml.IHTMLEle ment tblElement = (mshtml.IHTMLEl ement)
tblRow.Cells.it em(2,2);

value = tblElement.inne rText;

// Error Occur Here!
if (value.Length > 0 && value != string.Empty){
value = value.Trim();
}
}

I think the problem occur when the innerText is Empty and I am trying to
trim the value.


I don't think the problem is where you think it is.

Could you post a short but complete program which demonstrates the
problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.


Jun 15 '06 #6

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