webmethod int到列表和上的字符串
本文关键字:字符串 列表 int webmethod | 更新日期: 2023-09-27 18:26:48
我试图从web服务获取列表的总和。
[WebMethod]
public string CalculateSum(List<int> listInt)
{
int[] sum = listInt.ToArray();
return sum; // error under sum on this line
}
但是我得到错误无法将int转换为字符串,这应该工作吗?
客户代码:
public partial class Form1 : Form
{
List<int> listInt = new List<int>();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
listInt.Add(Convert.ToInt32(textBox1.Text));
textBox1.Clear();
listBox1.Items.Clear();
for (int i = 0; i < listInt.Count; i++)
{
listBox1.Items.Add(listInt[i]);
}
}
private void button2_Click(object sender, EventArgs e)
{
CalculateSumOfList.ServiceReference1.Service1SoapClient client = new CalculateSumOfList.ServiceReference1.Service1SoapClient();
CalculateSumOfList.ServiceReference1.ArrayOfInt arrayOfInt = new CalculateSumOfList.ServiceReference1.ArrayOfInt();
arrayOfInt.AddRange(listInt);
int result = client.CalculateSum(arrayOfInt); //here
label1.Text = Convert.ToString(result);
}
}
}
client.CalculateSum(arrayOfInt);
出现错误
[WebMethod]
public int CalculateSum(List<int> listInt)
{
int sum = listInt.Sum();
return sum; // error under sum on this line
}
注意函数的返回值——您声明它返回的是字符串而不是整数。
您可以使用任一
return sum.ToString();
或
return "" + sum;
但首先要考虑:求int值和的函数真的应该返回字符串吗?作为int
函数,它似乎更有意义:
public int CalculateSum(List<int> listInt)
{
int sum = listInt.Sum();
return sum; // now matches the return-type of the method
}