Question

以下是我收到错误的代码：

此代码用于Windows窗体，以验证用户是否在文本框中输入信息

private void btn_Submit_Click(object sender, EventArgs e)
{
    if(validateform())
    {
        return;
    }
}

private bool validateform()
{
    if (string.IsNullOrWhiteSpace(txtCustomerID.Text))
    {
        MessageBox.Show("Customer ID is required.");
        return false; 
    }

    if (string.IsNullOrWhiteSpace(txtProductID.Text))
    {
        MessageBox.Show("Product ID is required.");
        return false; 
    }

    if (string.IsNullOrWhiteSpace(txtOrderQty.Text))
    {
        MessageBox.Show("Order Qty is required.");
        return false; 
    }

    if (string.IsNullOrWhiteSpace(txtUnitPrice.Text))
    {
        MessageBox.Show("Unit Price is required.");
        return false; 
    }

    if (string.IsNullOrWhiteSpace(txtSubTotal.Text))
    {
        MessageBox.Show("Sub Total is required.");
        return false; 
    }

    if (string.IsNullOrWhiteSpace(txtTaxAmount.Text))
    {
        MessageBox.Show("Tax Amount is required.");
        return false; 
    }

    if (string.IsNullOrWhiteSpace(txtTotalDue.Text))
    {
        MessageBox.Show("Total Due is required.");
        return false; 
    }

    return true; <<<Return is underlined and the error reads:  Invalid token 'return' in  class, struct, or interface member declaration
}

Answer 1

您在上一个if语句后缺少一个开括号。这意味着右括号实际上是在关闭类，因此你的最后一个return语句在类之外。

只需添加左括号：

    // Other code here
    if (string.IsNullOrWhiteSpace(txtTotalDue.Text))
    {
        MessageBox.Show("Total Due is required.");
        return false; 
    }

    return true;
}

令牌错误无效

1 个答案: