Question

CS1503参数1：无法转换为＆＃39;字符串＆＃39;到＆＃39; int＆＃39;

这是我得到的错误。

 private void btnCalculate_Click(object sender, EventArgs e)
    {
        string strMailingLabel;

        try
        {
            //Create an instance of clsCustomer using the overloaded constructor
            clsCustomer cobjCustomer = new clsCustomer(txtName.Text, txtStreet.Text,
                                txtCity.Text, txtState.Text, txtZip.Text);


            strMailingLabel = cobjCustomer.Name + "\n" +
                              cobjCustomer.Street + "\n" +
                              cobjCustomer.City + ", " +
                              cobjCustomer.State + "  " + cobjCustomer.Zip;

            //Display mailing address
            lblMailingLabel.Text = strMailingLabel;

            //Create an instance of clsOrder using the overloaded constructor
            clsOrder cobjOrder = new clsOrder
                (txtDescription.Text,                 //Error is Here
                 int.Parse(txtQuantity.Text),
                 decimal.Parse(txtPrice.Text));


            cobjOrder.calcExtendedPrice();


            cobjOrder.accumulateTotals();


            lblExtension.Text = cobjOrder.ExtendedPrice.ToString("C");


            lblTotalCount.Text = clsOrder.TotalCount.ToString("N0");
            lblTotalPrice.Text = clsOrder.TotalPrice.ToString("C");
        }

这是订单代码

public clsOrder()
    {

    }
    public clsOrder(int intQuantity, decimal decPrice, decimal decDescription)
    {

        this.Quantity = intQuantity;
        this.Price = decPrice;
        this.Description = decDescription;
    }


//declare property methods

    public int Quantity
    {
        get
        {
            return cintQuantity;
        }
        set
        {
            cintQuantity = value;
        }
    }

    public decimal Price
    {
        get
        {
            return cdecPrice;
        }
        set
        {
            cdecPrice = value;
        }
    }

    public decimal Description
    {
        get
        {
            return cdecDescription;
        }
        set
        {
            cdecDescription = value;
        }
    }

我将描述设置为小数，我知道这是我做错了，问题是我不知道如何正确编码。有人有想法吗？

Answer 1

你订的错了。试试这个

clsOrder cobjOrder = new clsOrder(
  Convert.ToInt32(txtQuantity.Text),
  Convert.ToDecimal(txtPrice.Text),
  Convert.ToDecimal(txtDescription.Text));

Answer 2

        //Create an instance of clsOrder using the overloaded constructor
        clsOrder cobjOrder = new clsOrder
            (txtDescription.Text,                 //Error is Here
             int.Parse(txtQuantity.Text),
             decimal.Parse(txtPrice.Text));

在查看构造函数时似乎没有问题：

public clsOrder(int intQuantity, decimal decPrice, decimal decDescription)
{

    this.Quantity = intQuantity;
    this.Price = decPrice;
    this.Description = decDescription;
}

需要int, decimal, decimal，您的输入为string, int, decimal

以int开头，然后需要2 decimals。所以在我看来你不小心输入了错误的输入。

您需要的是：

        //Create an instance of clsOrder using the overloaded constructor
        clsOrder cobjOrder = new clsOrder
            (int.Parse(txtQuantity.Text),                 //Error is Here
             decimal.Parse(txtPrice.Text)),
             txtDescription.Text);


public clsOrder(int intQuantity, decimal decPrice, string decDescription)
{

    this.Quantity = intQuantity;
    this.Price = decPrice;
    this.Description = decDescription;
}

另请确保将Description更改为string！

编辑：正如有些人建议的那样，您可能想要使用TryParse。有很多关于如何使用它的信息。那不是你的主要问题，所以我不会用它来捣蛋。

参数1：无法转换为＆＃39; string＆＃39;到＆＃39; int＆＃39; （小错误只是不知道如何解决）

2 个答案: