asp.net - Duplicate values in multiple textbox -

asp.net - Duplicate values in multiple textbox -

how validate whether text in multiple textboxes unique each other.

it looks in asp.net not valid syntax

bool hasnoduplicate = (txtemergencyname1.text.trim() <> txtemergencyname2.text.trim() <> txtemergencyname3.text.trim <> txtemergencyname4.text.trim);

i looking efficient appraoch, kind of lamda look or inbuilt in asp.net

since you're asking lambda, here's linq approach.

var alltxt = new[] { txtemergencyname1, txtemergencyname2, txtemergencyname3, txtemergencyname4 }; var alltext = alltxt.select((txt, i) => new { text = txt.text.trim(), pos = + 1 }).tolist(); bool hasnoduplicate = !alltext.any(t => alltext.skip(t.pos).any(t2 => t.text == t2.text));

put relevant textboxes in collection array , utilize enumerable.any. skipping before current textbox avoid checking textboxes twice.

if relevant textboxes in container command panel, utilize enumerable.oftype find them:

ienumerable<textbox> alltxt = this.emergencypanel.controls.oftype<textbox>();

side-note: it's premature optimization anyway performant way validate controls. nil doing , there never millions of controls. instead should shortest or readable approach.

asp.net performance duplicates