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I am getting error on this int b = Convert.ToInt32(qty.Text); if i type more than 11 numbers in quantity textbox

if (Item_Name.Text == dr["Item_Name"].ToString() && Item_Code.Text == dr["Item_Code"].ToString()) { int a = Convert.ToInt32(dr["Selling_Price"].ToString()); if (qty.Text == "") { Selling_Price.Text = ""; } else { int b = Convert.ToInt32(qty.Text); //Error On This Line int c = a * b; Selling_Price.Text = c.ToString(); } }
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You're getting that exception because an integer cannot store a number that large.

Int32.MaxValue Field : The value of this constant is 2147483647

Switching to a long should solve the problem for you. When you're dealing with numbers that represent money, you might want to consider using decimal too.

if (Item_Name.Text == dr["Item_Name"].ToString() && Item_Code.Text == dr["Item_Code"].ToString()) { int price = Convert.ToInt32(dr["Selling_Price"].ToString()); if (qty.Text == "") { Selling_Price.Text = ""; } else { long quantity = Convert.ToInt64(qty.Text); long total = price * quantity; Selling_Price.Text = total.ToString(); } }
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2 Comments

If you can answer me this question as well i will be thankful to you:
I am using c# Windows Form. I have a quantity textbox if i type more then available stock for an selected item so how can i show messagebox and i want textbox.maxlength should be equal to available stock. Thanks

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