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StartIndex cannot be less than zero Getting Error


By : user9372062
Date : September 13 2020, 01:00 PM
it helps some times The result of the second attempt to find the index of the new line character returns -1, as there is no new line character anymore.
You can do the indexOf check as its own statement and only continue with the remove if it isn't -1.
code :
int index = textbox.Text.LastIndexOf(Environment.NewLine);
if(index > -1) {  
   textbox1.Text = textbox1.Text.Remove(index);
}


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Who does substring(startIndex,endIndex) return string from startIndex start till endIndex-1?


By : Ive
Date : March 29 2020, 07:55 AM
this one helps. Inclusive means that the item at that index will be included. Exclusive means that the item at that index will not be included.
The true reasons for this can only be guessed, unless you can find a comment in source code explaining it (possible), or find and ask the original author(s) (highly unlikely).

startIndex cannot be larger than length of string. Parameter name: startIndex in vb.net


By : Mauro Civelli
Date : March 29 2020, 07:55 AM
should help you out I have a piece of code that generates random characters. The problem is, every once in a while, it returns an error: , this code:
code :
Dim selChar As Integer = rdm.Next(1, 28)
Dim alpha As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"  (only 26 characters long)
alpha.Substring(selChar, 1)
Dim selChar As Integer = rdm.Next(0, alpha.Length) 
Dim selChar2 As Integer = rdm.Next(0, alpha2.Length) 

startIndex cannot be larger than length of string. Parameter name: startIndex vb.net


By : Bowen Jiang
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , TxtWeight is "" (so, nil) because it doesn't exist yet- all the declaration does is reserve the space in the memory but doesn't assign anything.
I'm unsure what you're trying to do here, and I suspect there's more to the code that you haven't posted (so please post it and I'll update my answer).

startIndex cannot be larger then length of string. Parameter name: startIndex MVC4


By : arsiduk
Date : March 29 2020, 07:55 AM
wish help you to fix your issue That error comes from something like Substring, when the value passed into the startIndex param is greater than the total length of the string. For example, if you had a string like "Just Testing" and you did .Substring(12, 1), you'd get that exception, as the string is only 12 characters long (remember that the index is from 0, not 1, so the last index is 11).
However, there is no code that you've included in your question which does anything like that. As a result, the error is being raised from somewhere else. Track down where you're working with Substring and figure out why your index is exceeding your string length.

StartIndex cannot be less than zero. Parameter name: startIndex Using HijriDatePicker?


By : user1958179
Date : March 29 2020, 07:55 AM
Hope this helps I am using a many instances of Hijri Gerogian Datapicker, with gridview control, when I delete from the gridview I receive the following error: , Look at this fragment of code:
code :
strPostBackControlName.LastIndexOf("$")
public string Substring (int startIndex);
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