check index in string array in asp.net

Question

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I have a string array
and i want to check , if index in array exist or not
for exp, my array can be

ckh[0]="111"
ckh[2]="222"

or

VB

ckh[1]="345"
ckh[2]="222"

i want to check if string array has 0 , 1 , 2 index or not

Posted 12-Jan-14 22:29pm

maulikshah1990

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Comments

joginder-banger 13-Jan-14 4:30am

what's you try ??

joginder-banger 13-Jan-14 4:30am

array.count();

maulikshah1990 13-Jan-14 4:31am

i use Getvalue , elementat..but that gives error ..

maulikshah1990 13-Jan-14 4:33am

i used try and catch and get error as
{"Index was out of range. Must be non-negative and less than the size of the collection.\r\nParameter name: index"}

Cenarjun 13-Jan-14 4:45am

use array.contains()

Gandalf_TheWhite 13-Jan-14 4:58am

Do you want to check length of the array?

6 solutions

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Karthik_Mahalingam · Answer 1 · 2014-01-12T22:38:00

Solution 1

Try this..

C#

string[] ckh = { "111", "222" };

        string value = "111";
        int index =  ckh.ToList().IndexOf(value);

Posted 12-Jan-14 22:38pm

Karthik_Mahalingam

Comments

maulikshah1990 13-Jan-14 4:45am

I first search for index because i dont know value.they are dynamic
i have just put example above

Karthik_Mahalingam 13-Jan-14 4:46am

ok, what is your issue >?
provide more details..

maulikshah1990 13-Jan-14 4:51am

I have values in string array ...
i have string array as

ckh[0]=null
ckh[1]="22d"
ckh[2]="aa"
or it can be

ckh[0]=null
ckh[1]=null
ckh[2]="aqs"

and i run for loop and want to check if 0 or 1 or 2 exist , then get value inside that

thats it............

Karthik_Mahalingam 13-Jan-14 4:55am

try like this
string[] ckh = new string[3] ;

ckh[0] = null;
ckh[1] = "22d";
ckh[2] = "aa";

for (int i = 0; i < ckh.Length; i++)
{
if (ckh[i] != null)
{
string value = ckh[i];
}
}

Gitanjali Singh · Answer 2 · 2014-01-12T22:44:00

C#

string [] arr = {"One","Two","Three"};
              var target = "One";
              var results = Array.FindAll(arr, s => s.Equals(target));

OR

C#

string stringToCheck = "text1";
string[] stringArray = { "text1", "testtest", "test1test2", "test2text1" };
foreach (string x in stringArray)
{
    if (x.Contains(stringToCheck))
    {
        // Process...
    }
}

Give it a try.This may help.If not ask here.

Gandalf_TheWhite · Answer 3 · 2014-01-12T22:59:00

Solution 3

Check this link, may be this is what you are looking for.
http://stackoverflow.com/questions/16684609/how-to-check-the-condition-in-asp-net-for-string-array[^]

http://asp-net-example.blogspot.in/2009/01/how-to-get-string-array-specific-index.html[^]
^

Posted 12-Jan-14 22:59pm

Gandalf_TheWhite

v2

Comments

maulikshah1990 13-Jan-14 5:00am

i got the answer by using ElementAtOrDefault

Gandalf_TheWhite 13-Jan-14 5:02am

Great! Thumbs Up!

Sandeep Singh Shekhawat · Answer 4 · 2014-01-12T23:01:00

When you create an Array of String means that is automatically assigned null values to each index position. Now you need to check null exist or not on any position like:

C#

string []ckh = new string[10];
            ckh[0]="111";
            ckh[2] = "222";
            for(int i=0;i<ckh.Length;i++)
            {
                if(ckh[i]!=null)
                {
                    Response.Write(String.Format("Index {0} Value is {1}",i,ckh[i]));

                }
                else
                {
                     Response.Write(String.Format("Index {0} does not exist",i));

                }
            }

Bala Selvanayagam · Answer 5 · 2014-01-12T23:01:00

you could do without running a loop

C#

protected void Button1_Click(object sender, EventArgs e)
    {

       string[] myArray=  {"A","B","C"};
       string myValue;

        //GET 4th ELEMENT
        try
        {
            myValue = myArray[4];
        }
        catch (Exception)
        {
            myValue = "does not exist";
        }


    }

maulikshah1990 · Answer 6 · 2014-01-12T23:00:00

Solution 4

i got the answer by using ElementAtOrDefault

Posted 12-Jan-14 23:00pm

maulikshah1990

Comments

Sergey Alexandrovich Kryukov 10-Mar-14 0:49am

Not an answer.
—SA

check index in string array in asp.net

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