c# - Error when trying to convert TextBox.Text value to Int32 -


in txtdefinavalor.text can enter values 1% 999%, made code if value higher 100%, change value of textbox 100%. it, removed % textbox , made if code using convert.int32 (had same error), tried int32.parse (had same error).

error "input string not in incorrect format" on line:

string valor = txtdefinavalor.text.replace("%", string.empty);

i think textbox after replace % "" integer number , wasnt need convert, can't make string > value

see full code:

if (rbtpercentualmensal.checked || rbtpercentualmedioanual.checked) {     string valor = txtdefinavalor.text.replace("%", string.empty);     if (int32.parse(valor) > 100)     {         txtdefinavalor.text = "100%";     } }

how solve it?

try replaceing "." , "," (if users entered them), , trim!

string valor = txtdefinavalor.text.replace("%", string.empty).replace(",", string.empty).replace(".", string.empty).trim();

or

there may invalid int char in string. solve this, use foreach loop:

        foreach (char letter in valor)         {             if(!char.isdigit(letter))                 valor = valor.replace(letter.tostring(), string.empty);         }

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