小编sab*_*wan的帖子

我想在1个文本框中计算五个文本框的总和....但是当我从五个文本框中保留一个文本框时,它会给出错误输入字符串格式不正确下面是我的代码

        if (textBox6.Text.Length == 0)

        // textBox12.Text = (Convert.ToInt32(textBox5.Text) - Convert.ToInt32(textBox11.Text)).ToString();
        {
            textBox11.Text = (Convert.ToInt32(textBox7.Text) + Convert.ToInt32(textBox8.Text) + Convert.ToInt32(textBox9.Text) + Convert.ToInt32(textBox10.Text)).ToString();
            textBox12.Text = (Convert.ToInt32(textBox5.Text) - Convert.ToInt32(textBox11.Text)).ToString();
        }
        else if (textBox7.Text.Length == 0)
        {
            //textBox11.Text = (Convert.ToInt32(textBox6.Text) + Convert.ToInt32(textBox7.Text) + Convert.ToInt32(textBox8.Text) + Convert.ToInt32(textBox9.Text) + Convert.ToInt32(textBox10.Text)).ToString();
            textBox11.Text = (Convert.ToInt32(textBox6.Text) + Convert.ToInt32(textBox8.Text) + Convert.ToInt32(textBox9.Text) + Convert.ToInt32(textBox10.Text)).ToString();
            textBox12.Text = (Convert.ToInt32(textBox5.Text) - Convert.ToInt32(textBox11.Text)).ToString();
        }
        else if (textBox8.Text.Length == 0)
        {
            //textBox11.Text = (Convert.ToInt32(textBox6.Text) + Convert.ToInt32(textBox7.Text) + Convert.ToInt32(textBox8.Text) + Convert.ToInt32(textBox9.Text) + Convert.ToInt32(textBox10.Text)).ToString();
            textBox11.Text = (Convert.ToInt32(textBox6.Text) + …