Error while updating records in dynamic. ?

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SQL-Server-2005

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hi am using dynamic in my page .while updating record am getting error like
"

startIndex cannot be less than zero
parameter name :startIndex

"
in this line

fieldNames.Remove(fieldNames.Length - 1, 1);

can any one tel me wat type of error and how to solve this..
thanks

Posted 30-Apr-12 23:07pm

ythisbug

Updated 30-Apr-12 23:44pm

v4

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Comments

bhagirathimfs 1-May-12 5:10am

what is fieldNames here?

ythisbug 1-May-12 5:11am

StringBuilder fieldNames = new StringBuilder();

6 solutions

Solution 1

startIndex cannot be less than zero
fieldNames.Remove(fieldNames.Length - 1, 1);
These simply means that your fieldNames.Length was zero at some instance and hence an error.

See the counts in the fieldNames. Use VS DEBUGGER and check. It looks like empty, hence zero count/length and so when you tried to remove from (0-1 = -1) index, error occurred.

Posted 30-Apr-12 23:19pm

Sandeep Mewara

Comments

ythisbug 1-May-12 5:32am

so now where i have to modify?

ythisbug 1-May-12 5:50am

m getting fieldNames.Lenth=0 value

Sandeep Mewara 1-May-12 8:23am

Wrap it in a if else. Check for length >0 before doing it.

Solution 2

Obviously the length of fieldNames is zero. Thus the Remove command throws an error.

Posted 30-Apr-12 23:22pm

Abhinav S

Comments

ythisbug 1-May-12 5:32am

so now where i have to modify?

Solution 3

If stringBulider length is 0

C#

fieldNames.Remove(fieldNames.Length - 1, 1);

the above code will not work.

So before run the above code please check whether the stringbuilder length is not equal t zero.

This error is coming because your are assigning the start index less than zero.
The start index is always greater than zero.

Posted 30-Apr-12 23:24pm

bhagirathimfs

Comments

ythisbug 1-May-12 5:32am

so now where i have to modify?

ythisbug 1-May-12 5:50am

am getting length 0

bhagirathimfs 1-May-12 5:52am

first insert into the stringbuilder than remove
or put a if statement before execute above code.

Solution 4

Refer similar thread on CP
StartIndex cannot be less than zero.[^]
StartIndex cannot be less than zero. Parameter name: startIndex[^]

Posted 30-Apr-12 23:45pm

Anuja Pawar Indore

Solution 5

hi..
i suppose you have got the reason for your problem, here is one way out for this
you can put if condition to check that the index i.e. fieldNames.Length - 1
should not be negative.
or you can also use try catch block for this..
thanks..

Posted 30-Apr-12 23:47pm

preet88

Comments

bhagirathimfs 1-May-12 6:19am

In the above query you are getting the above error?

Because when the objFieldProp.FieldType is not match with any of the cases than the stringbuilder is remain empty (means length of the stringbuilder is zero).At that time,above error will show .

so before the remove statement write if clause like

if(fieldNames.Length != 0)
{
fieldNames.Remove(fieldNames.Length - 1,1);
fieldValues.Remove(fieldValues.Length - 1, 1);
}

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Nigam Patel · Accepted Answer · 2012-04-30T23:54:00

Solution 6

hi ,

your code will not work because fieldNames variable length equal to zero.

Try below code

if(fieldNames.Length > 0)
{
fieldNames.Remove(fieldNames.Length - 1, 1);
}

hop it will help!!

Posted 30-Apr-12 23:54pm

Nigam Patel

Comments

ythisbug 1-May-12 6:20am

thanks dude..