How to Remove Duplicates in Multiline Textbox by using Javascript?

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I Have Two Multiline Textboxes and in first textbox i enter some numbers with duplicates also and now i enter numbers in second textbox.when i press filter button i get the values which are available in both the textboxes like
textbox1
9900990099,9977889977,9900887766
textbox2
9900990099,1234567890,0987654321

whn i press filter button i get
9900990099 ( both the textboxes are have)
how can i do this in Javascript. pls help me

Posted 24-Jan-15 1:12am

benzimen

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Sergey Alexandrovich Kryukov 24-Jan-15 12:48pm

Wouldn't that be better to avoid duplicates in first place?
—SA

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Thomas Daniels · Answer 1 · 2015-01-24T01:42:00

Solution 1

Try the below code. It works for ASP.NET; from your comment, I saw you used that.

JavaScript

var txt1 = document.getElementById('<%= txt1.ClientID %>').value;
var txt2 = document.getElementById('<%= txt2.ClientID %>').value;
var txt1values = txt1.split(",");
var txt2values = txt2.split(",");
var commonValues = [];
for (var i = 0; i < txt1values.length; i++) {
    var curr = txt1values[i];
    if (txt2values.indexOf(curr) != -1) {
        commonValues.push(curr);
    }
}
var commonValuesStr = commonValues.join(",");
document.getElementById('<%= txt3.ClientID %>').value = commonValuesStr;

How does this work? The ASP.NET server replaces <%= txt1.ClientID %> by the ID that can be used on the client side. Then, the code splits the text by a comma. Then, it loops over all values of the first textbox. Is that value also in the values of the second textbox? Then it gets added to commonValues. At the end, all values in commonValues get joined with a comma.

Posted 24-Jan-15 1:42am

Thomas Daniels

Updated 24-Jan-15 2:07am

v4

Comments

benzimen 24-Jan-15 7:50am

thanks for u r reply..i have one doubt what it is in javascript we get any control value with the help of document.getelementbtid("txt1").value;
but you are not mentioned...

Thomas Daniels 24-Jan-15 7:54am

Oh, right, I forgot to mention that. Is your textbox a input type="text" or a textarea?

benzimen 24-Jan-15 7:55am

<asp:TextBox ID="txt1" TextMode="MultiLine" runat="server">

Thomas Daniels 24-Jan-15 8:06am

I edited my answer.

benzimen 24-Jan-15 8:09am

intelligance does not show split()
var txt1values = txt1.

Thomas Daniels 24-Jan-15 8:11am

I have no idea why it doesn't show that, but split really exists.

benzimen 24-Jan-15 8:13am

you are also not getting split()

Thomas Daniels 24-Jan-15 8:15am

What do you mean?

benzimen 24-Jan-15 8:19am

sir...i mean if my VS working properly or not...dont think in another way recently i launced my vs in system so is it my fault or not i dont know..and iam not good in english

Thomas Daniels 24-Jan-15 8:22am

It's not your fault. I also don't see a split. It's probably because VS does not recognize the type of .value.

benzimen 24-Jan-15 8:26am

ok.....how to rectifyed it?

Thomas Daniels 24-Jan-15 8:29am

I have no idea; perhaps you even cannot. But while VS does not show it, it still works when testing it, so it's nothing to really worry about.

benzimen 24-Jan-15 8:32am

Thank you

Thomas Daniels 24-Jan-15 8:34am

You're welcome!