问题
Is there a way to handle a list of doubles I can handle ints with the code below but not sure how to handle array of doubles.
{
CalculateSumOfList.ServiceReference1.Service1SoapClient client = new CalculateSumOfList.ServiceReference1.Service1SoapClient();
CalculateSumOfList.ServiceReference1.ArrayOfInt arrayOfInt = new CalculateSumOfList.ServiceReference1.ArrayOfInt();
arrayOfInt.AddRange(listDouble); // error here!
string result = client.CalculateSum(arrayOfInt);
label1.Text = Convert.ToString(result);
}
This is all wrong tho I need instead of ArrayOfInt to have Array of double?
Client Side:
namespace CalculateSumOfList
{
public partial class Form1 : Form
{
List<Double> listDouble = new List<Double>();
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)
{
listDouble.Add(Convert.ToDouble(textBox1.Text));
textBox1.Clear();
listBox1.Items.Clear();
for (int i = 0; i < listDouble.Count; i++)
{
listBox1.Items.Add(listDouble[i]);
}
textBox1.Clear();
listBox1.Items.Clear();
for (int i = 0; i < listDouble.Count; i++)
{
listBox1.Items.Add(listDouble[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(listDouble); // error here!
string result = client.CalculateSum(arrayOfInt);
label1.Text = Convert.ToString(result);
}
}
}
Web Method:
namespace CalculateWebServiceSum
{
/// <summary>
/// Summary description for Service1
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class Service1 : System.Web.Services.WebService
{
[WebMethod]
public string CalculateSum(List<double> listDouble)
{
return listDouble.Sum().ToString();
}
}
}
回答1:
I'm not clear what your question is, but:
If arrayOfInt.AddRange( listOfDouble ) is not compiling you could use Linq and do
arrayOfInt.AddRange( listOfDouble.Select( d => (int)d ).ToList() );
The method client.CalculateSum expects a parameter of type List<double>
1) I would change that if possible to be public string CalculateSum(IEnumerable<double> items) which is more flexible
2) As above you can convert a list of any convertible type using list.Select(n => (double)n).ToList() assuming that (double)n is a valid cast.
回答2:
If I understand your question properly, you need to call ConvertAll to a type of decimal before you can add the listOfDecimal.
var convertedDecimalList = arrayOfInt.ConvertAll<decimal>
(element => (decimal)element);
convertedDecimalList.AddRange(listDecimal);
UPDATED:
CalculateSumOfList.ServiceReference1.Service1SoapClient client =
new CalculateSumOfList.ServiceReference1.Service1SoapClient();
CalculateSumOfList.ServiceReference1.ArrayOfInt arrayOfInt =
new CalculateSumOfList.ServiceReference1.ArrayOfInt();
var listOfIntAsDouble = arrayOfInt.ConvertAll(x=>Convert.ToDouble(x));
listOfIntAsDouble .AddRange(listDouble);
string result = client.CalculateSum(listOfIntAsDouble);
label1.Text = Convert.ToString(result);
来源：https://stackoverflow.com/questions/9570791/list-to-handle-array-of-doubles