How to take array element and check in another another arrays

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arr1 = wavFiles.ToArray();
arr2 = BaseDocs.ToArray();
arr3 = TemplateDocs.ToArray();
arr4 = DraftDocs.ToArray();

I have four arrays i need to take the elements in the first array and check whether it is in second,third and fourth array elements if they exists i need to store in string variables how can i do this

What I have tried:

I could not get how to do this

Posted 21-Aug-17 23:09pm

kav@94

Updated 21-Aug-17 23:17pm

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Thomas Daniels · Answer 1 · 2017-08-21T23:17:00

Solution 1

You can use the LINQ method Intersect[^] to easily find elements in both arrays:

C#

var inBothArr1AndArr2 = arr1.Intersect(arr2);
var inBothArr1AndArr3 = arr1.Intersect(arr3);
var inBothArr1AndArr4 = arr1.Intersect(arr4);

Now you have three IEnumerable<T>s. Do with their contents what you need to do.

[Edit]

From your comment, it appears you want to do this one-by-one. That's possible too:

C#

for (int i = 0; i < arr1.Length; i++)
{
    if (arr2.Contains(arr1[i]))
    {
        // Array 2 contains this element. Index: i. Value: arr1[i]
    }
    // do the same for arr3 and arr4
}

Posted 21-Aug-17 23:17pm

Thomas Daniels

Updated 21-Aug-17 23:23pm

v2

Comments

Thomas Daniels 22-Aug-17 5:24am

See my edit.

kav@94 22-Aug-17 5:26am

for (int i = 0; i < wavarr.Length; i++)
{
if (basearr.Contains(wavarr[i]))
{
// Array 2 contains this element. Index: i. Value: arr1[i]
}
// do the same for arr3 and arr4
}

i had did this but it is giving below error

'System.Array' does not contain a definition for 'Contains' and no extension method 'Contains' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?) C:\Users\yaminik\Desktop\MT original from network with 208 db\mttraining\SubjectItems.aspx.cs 153 28 C:\...\mttraining\

Thomas Daniels 22-Aug-17 5:27am

Add using System.Linq; at the top of your file.

Thomas Daniels 22-Aug-17 5:40am

If you want to store multiple of these variables, you can create a List<string> and store them there.

Thomas Daniels 22-Aug-17 5:47am

On top of your file: using System.Collections.Generic;

Before your for loop: List<string> list = new List<string>();

Inside the 'if' statement of the loop: list.Add(arr1[i]);

After the for loop, you can access the list like an array.

kav@94 22-Aug-17 7:06am

my first array

"400005733.wav"
"400006813.wav"

my second array

"400005733-b.doc"
"400006813-b.doc"

if we see them 400005733.wav matches with 400005733-b.doc irresptive of exctensions but i have -b which should be removed and that name after removing -b "400005733.doc" this should be saved in a string variable how can i do this

Thomas Daniels 22-Aug-17 13:06pm

In the System.IO.Path class, there is a method GetFileNameWithoutExtension method, you can use that.

Also you can use the Replace method on a string to remove the "-b", like yourString.Replace("-b", "");

How to take array element and check in another another arrays

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How to take array element and check in another another arrays

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