Rent textbox

Question

Rent Texbox

Service Textbox

Grossrent Textbox

Tds Textbox

Netrent Textbox

i typed the rent and service for example 2000 + 3000 5000 as Groos rent

then tds 200 net rent will be 4800.

i want to restrict serive tax should not be more as rent and tds should not more than gross rent

for that send the code.

help me.

Regds,
Narasiman P

Vulpes · Answer

Try: private void txt_tax_TextChanged(object sender EventArgs e) { int a b c d; if (!int.TryParse(txt_rent.Text out a) || a { MessageBox.Show(Not a valid number. Please reenter.); txt_rent.Focus(); return; } if (!int.TryParse(txt_tax.Text out b) || b { MessageBox.Show(Not a valid number. Please reenter.); txt_tax.Focus(); return; } if (b > a) { MessageBox.Show(Service tax cannot exceed rent. Please reenter.); txt_tax.Focus(); return; } if (!int.TryParse(txt_tds.Text out b) || c { MessageBox.Show(Not a valid number. Please reenter.); txt_tds.Focus(); return; } d = a + b; txt_grossrent.Text = d.ToString(); if (c > d) { MessageBox.Show(TDS cannot exceed gross rent. Please reenter.); txt_tds.Focus(); return; } d -= c; txt_netrent.Text = d.ToString(); }