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dynamic textbox validation

Master Vinu asked:

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this is my table structure 2 column rate chart and qty :
ratechart qty
1-5 1
6-10 2
11-20 3

i have 3 field on form
1 combobox
1 textbox
1 button

i fetch the ratechart column value through combobox , i have that code but

my requirement is if user select 1-5 from combobbx , then textbox he cannot enter more than 6 in textbox.

same if user select 6-10 from combobox , then he cannot enter more than 12 in textbox

while he click on save button he get an error that qty is more..

thx in advance genius please helping for the code
Tags: C#


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