没有方法'polygonArea'的重载采用'0'参数如何解决我在下面的程序中得到这个错误 [英] No overload for method 'polygonArea' takes '0' arguments how to solve am getting this erroe for below program

问题描述

 使用系统; 
 使用 System.Configuration; 
 使用 System.Data; 
 使用 System.Linq; 
 使用 System.Collections; 
 使用 System .Collections.Generic; 
 使用 System.Web.UI.WebControls; 
 使用 System.Web.UI.WebControls.WebParts; 
 使用 System.Xml.Linq; 
 使用 System.IO; 
 使用 System.Data.OleDb; 
 使用 System.ComponentModel; 
 
  public   partial   class  _Default：System.Web.UI.Page 
 {
  class  Point { double  X，Y; } 
 DataTable dt =  new  DataTable（）; 
  int  X，Y; 
 受保护  void  Page_Load（ object  sender，EventArgs e）
 {
 
} 
  protected   void  btnSubmit_Click（ object  sender，EventArgs e）
 {
  string  connectionString =  ; 
  if （FileUpload1.HasFile）
 {
  string  fileName = Path.GetFileName（FileUpload1.PostedFile.FileName）; 
  string  fileExtension = Path.GetExtension（FileUpload1.PostedFile.FileName）; 
  string  fileLocation = Server.MapPath（  〜/ App_Data / + fileName）; 
 FileUpload1.SaveAs（fileLocation）; 
  if （fileExtension ==  。xls ）
 {
 connectionString =   Provider = Microsoft.Jet.OLEDB。 4.0;数据源= + fileLocation +  ;扩展属性= \Excel 8.0; HDR =是; IMEX = 2\ ; 
} 
  else   if （fileExtension ==  。xlsx）
 {
 connectionString =   Provider = Microsoft.ACE.OLEDB.12.0; Data Source = + fileLocation +  ;扩展属性= \Excel 12.0; HDR =是; IMEX = 2 \; 
} 
 OleDbConnection con =  new  OleDbConnection（connectionString）; 
 OleDbCommand cmd =  new  OleDbCommand（）; 
 ArrayList List =  new  ArrayList（）; 
 cmd.CommandType = System.Data.CommandType.Text; 
 cmd.Connection = con; 
 OleDbDataAdapter dAdapter =  new  OleDbDataAdapter（cmd）; 
 DataTable dtExcelRecords =  new  DataTable（）; 
 con.Open（）; 
 DataTable dtExcelSheetName = con.GetOleDbSchemaTable（OleDbSchemaGuid.Tables， null ）; 
  string  getExcelSheetName = dtExcelSheetName.Rows [ 0 ] [  Table_Name]。ToString（）; 
 cmd.CommandText =   SELECT * FROM [ + getExcelSheetName +  ]; 
 dAdapter.SelectCommand = cmd; 
 dAdapter.Fill（dtExcelRecords）; 
  if （会话[  dtInSession]！=  null ）
 {
 dt =（DataTable）Session [  dtInSession]; 
} 
  for （ int  i =  0 ; i <  dtExcelRecords.Rows.Count; i ++）
 {
  //  如果你想得到字符串 
 DataRow thisRow =（DataRow）dtExcelRecords.Rows [i]; 
 X = Convert.ToInt32（thisRow [  X]）; 
 Y = Convert.ToInt32（thisRow [  Y]）; 
  //   double Length = Convert.ToDouble（Y）;  
  //   double X1 = Convert.ToDouble（X）;  
 DataRow dr = dt.NewRow（） ; 
 polygonArea（）; 
} 
 
} 
} 
 
  private   Double  polygonArea（ int  [] X， int  [] Y）
 {
  Double  area =  0 。 0 ; 
  int  j = X.Length  -   1 ; 
  for （ int  i =  0 ; i <  X.Length; i ++）
 {
 area = area +（X [j] + X [i] *（ Y [j]的-Y [I]））; 
 j = i; 
} 
 area = area /  2 ; 
  if （area <   0 ）
 area = area * -1; 
 返回区域; 
} 
 
} 

解决方案

我强烈建议您参考这些链接



C＃中的功能 [ ^ ]



< a href =http://msdn.microsoft.com/en-us/library/ms173114.aspx>方法（C＃编程指南） [ ^ ]



问候..

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Collections;
using System .Collections.Generic ;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.Data.OleDb;
using System.ComponentModel;

public partial class _Default : System.Web.UI.Page
{
    class Point { double X, Y; }
    DataTable dt = new DataTable();
    int X, Y;
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        string connectionString = "";
        if (FileUpload1.HasFile)
        {
            string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
            string fileExtension = Path.GetExtension(FileUpload1.PostedFile.FileName);
            string fileLocation = Server.MapPath("~/App_Data/" + fileName);
            FileUpload1.SaveAs(fileLocation);
            if (fileExtension == ".xls")
            {
                connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
            }
            else if (fileExtension == ".xlsx")
            {
                connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
            }
            OleDbConnection con = new OleDbConnection(connectionString);
            OleDbCommand cmd = new OleDbCommand();
            ArrayList List = new ArrayList();
            cmd.CommandType = System.Data.CommandType.Text;
            cmd.Connection = con;
            OleDbDataAdapter dAdapter = new OleDbDataAdapter(cmd);
            DataTable dtExcelRecords = new DataTable();
            con.Open();
            DataTable dtExcelSheetName = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
            string getExcelSheetName = dtExcelSheetName.Rows[0]["Table_Name"].ToString();
            cmd.CommandText = "SELECT * FROM [" + getExcelSheetName + "]";
            dAdapter.SelectCommand = cmd;
            dAdapter.Fill(dtExcelRecords);
            if (Session["dtInSession"] != null)
            {
                dt = (DataTable)Session["dtInSession"];
            }
            for (int i = 0; i < dtExcelRecords.Rows.Count; i++)
            {
                //if you want to get the string
                DataRow thisRow = (DataRow)dtExcelRecords.Rows[i];
                X = Convert.ToInt32(thisRow["X"]);
                Y = Convert.ToInt32(thisRow["Y"]);
                //double Length = Convert.ToDouble(Y);
                //double X1 = Convert.ToDouble(X);
                DataRow dr = dt.NewRow();
                polygonArea();
            }

        }
    }

    private Double polygonArea(int[] X,int[] Y)
    {
        Double area = 0.0;
        int j = X.Length - 1;
   for (int i=0; i < X.Length; i++) 
   {
    area=area+(X[j]+X[i]*(Y[j]-Y[i])); 
           j=i;    
   }
   area =area/ 2;
        if (area < 0)
        area = area * -1;
    return area;
}
    
}  

解决方案

I strongly recommend you to refer these links

Functions in C#[^]

Methods (C# Programming Guide)[^]

Regards..

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