How To SET CUSTOM TEXTBOX validation

Sandeep Kumar

I have a TextBox id txtInvoiceNo in which Invoice No must be in the given format AD2122IN01999.

Means First Two will be in letters then numeric then again two letters and so on as mention above in yellow color

Invoice No.

3 Replies

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Sandeep Kumar4y ago
PLEASE HELP NO IDEA ABOUT REGEX,PLS WRITE REGULAR EXPRESSION
Sandeep Kumar4y ago
give a method where we can check on button click

You check it on button click

btnsave() {
  var txtData = document.getElementById(“txtInvoiceNo”).value;
  If(txtData != “”) {
    //.. Apply regex rule
  }
}

Follow this logic it should work