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.InternalSubStringWithChecks(Int32 startIndex, Int32
length, Boolean fAlwaysCopy) ...

Please Help!
Thanks.
Regards Dat.

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.InternalSubStringWithChecks(Int32 startIndex, Int32
> length, Boolean fAlwaysCopy) ...
>
> Please Help!
> Thanks.
> Regards Dat.

Hi Hitesh,

My code extract data from the mshtml.HTMLElement

string value;
mshtml.IHTMLDocument2 doc;
mshtml.IHTMLElementCollection tbls = (mshtml.IHTMLElementCollection)
((mshtml.IHTMLElementCollection) doc.body.all).tags("table");
mshtml.HTMLTable tbl = (mshtml.HTMLTable) tbls.item(1,1);
mshtml.HTMLTableRow tblRow = (mshtml.HTMLTableRow) tbl.rows.item(1,1);

if (tblRow.cells != null)
{
mshtml.IHTMLElement tblElement = (mshtml.IHTMLElement)
tblRow.Cells.item(2,2);

value = tblElement.innerText;

// 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.

(E-Mail Removed) 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.InternalSubStringWithChecks(Int32 startIndex, Int32
>> length, Boolean fAlwaysCopy) ...
>>
>> Please Help!
>> Thanks.
>> Regards Dat.
>

Dat K. AU DUONG <(E-Mail Removed)> wrote:
> Hi Hitesh,
>
> My code extract data from the mshtml.HTMLElement
>
> string value;
> mshtml.IHTMLDocument2 doc;
> mshtml.IHTMLElementCollection tbls = (mshtml.IHTMLElementCollection)
> ((mshtml.IHTMLElementCollection) doc.body.all).tags("table");
> mshtml.HTMLTable tbl = (mshtml.HTMLTable) tbls.item(1,1);
> mshtml.HTMLTableRow tblRow = (mshtml.HTMLTableRow) tbl.rows.item(1,1);
>
> if (tblRow.cells != null)
> {
> mshtml.IHTMLElement tblElement = (mshtml.IHTMLElement)
> tblRow.Cells.item(2,2);
>
> value = tblElement.innerText;
>
> // 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 - <(E-Mail Removed)>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

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 <(E-Mail Removed)> wrote:
>> Hi Hitesh,
>>
>> My code extract data from the mshtml.HTMLElement
>>
>> string value;
>> mshtml.IHTMLDocument2 doc;
>> mshtml.IHTMLElementCollection tbls = (mshtml.IHTMLElementCollection)
>> ((mshtml.IHTMLElementCollection) doc.body.all).tags("table");
>> mshtml.HTMLTable tbl = (mshtml.HTMLTable) tbls.item(1,1);
>> mshtml.HTMLTableRow tblRow = (mshtml.HTMLTableRow) tbl.rows.item(1,1);
>>
>> if (tblRow.cells != null)
>> {
>> mshtml.IHTMLElement tblElement = (mshtml.IHTMLElement)
>> tblRow.Cells.item(2,2);
>>
>> value = tblElement.innerText;
>>
>> // 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.
>

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 <(E-Mail Removed)> wrote:
> >> Hi Hitesh,
> >>
> >> My code extract data from the mshtml.HTMLElement
> >>
> >> string value;
> >> mshtml.IHTMLDocument2 doc;
> >> mshtml.IHTMLElementCollection tbls = (mshtml.IHTMLElementCollection)
> >> ((mshtml.IHTMLElementCollection) doc.body.all).tags("table");
> >> mshtml.HTMLTable tbl = (mshtml.HTMLTable) tbls.item(1,1);
> >> mshtml.HTMLTableRow tblRow = (mshtml.HTMLTableRow) tbl.rows.item(1,1);
> >>
> >> if (tblRow.cells != null)
> >> {
> >> mshtml.IHTMLElement tblElement = (mshtml.IHTMLElement)
> >> tblRow.Cells.item(2,2);
> >>
> >> value = tblElement.innerText;
> >>
> >> // 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.
> >