Error 54 'charttype.MyMethod()': not all code paths return a value

Question

1.00/5 (2 votes)

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Aim-Want to display in chart form

My CS page

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
using MySql.Data.MySqlClient;
using System.Web.Script.Serialization;

public partial class charttype : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
            string a1 = Session["username"].ToString();
            string a2 = Session["pass"].ToString();
        }
        catch (Exception err)
        {
            //Server.Transfer("AdminLogin1.aspx");
        }


        string firstname = "", lastname = "";
        try
        {
            firstname = Session["firstname"].ToString();
        }
        catch (Exception err)
        {

        }

        try
        {
            lastname = Session["lastname"].ToString();
        }
        catch (Exception err)
        {

        }
        try
        {
            Label11.Text = "Hi,    " + firstname + "  " + lastname;
        }
        catch (Exception err)
        {

        }
    }

  [WebMethod]
  public static string MyMethod()  //This line is showing error
  {

Posted 7-Jul-13 21:23pm

Roopa 10064853

Updated 8-Jul-13 1:32am

sjelen

v4

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Comments

Mukesh Ghosh 8-Jul-13 3:28am

See no one is here to check each & every line that you have paste, tell us your problem or line no. that might help to trace the issue.

OriginalGriff 8-Jul-13 3:53am

That is a code dump.
Edit your question, and cut it down to just the relevant parts - because nobody wants to wade through that to try and work out what you are talking about.
Help us to help you!
Use the "Improve question" widget to edit your question and provide better information.

[no name] 8-Jul-13 6:43am

Your error message is perfectly clear. You are not returning a value from all paths in your MyMethod method. But since you did not show us any code relevant to that, we can't tell.

2 solutions

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OriginalGriff · Answer 1 · 2013-07-08T02:14:00

When you show us a code fragment, it is normally an idea to show us the section showing teh problem, rather than the bit above that...

But, since your method returns a string, and the error message is pretty explicit, it is fairly obvious: the compiler has found that there is at least one path through your MyMethod method which does not result in a return statement. This can be because you forgot to put it as the end, or that you have an if condition that returns a string, and an else that doesn't.

But you didn't show us the code, so it will be up to you to look at it and work out which piece of code is wrong!

Roopa 10064853 · Answer 2 · 2013-09-12T20:31:00

ASPX PAGE
]]>

<asp:content id="Content1" contentplaceholderid="HeadContent" runat="Server" xmlns:asp="#unknown">

<asp:content id="Content2" contentplaceholderid="MainContent" runat="Server" xmlns:asp="#unknown">

<%----%>

google.load('visualization', '1', { packages: ['corechart'] });

]]>

$(document).ready(function () {

$.ajax({
type: 'POST',
dataType: 'json',
contentType: 'application/json',
url: 'Default6.aspx/GetData',

data: {},
success:
function (response) {
drawVisualization(response.d);
}

});
})

function drawVisualization(dataValues) {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Column Name');
data.addColumn('number', 'Column Value');

for (var i = 0; i < dataValues.length; i++) {
data.addRow([dataValues[i].ColumnName, dataValues[i].Value]);
}

new google.visualization.PieChart(document.getElementById('visualization')).
draw(data, { title: " JQuery Charts Example" });
}

#todate
{
z-index: 1;
left: 577px;
top: 115px;
position: absolute;
width: 104px;
height:16px;
}
#fromdate
{
z-index: 1;
left: 276px;
top: 115px;
position: absolute;
width: 104px;
height:16px;

}

style="color:#000066; z-index: 1; left: 795px; top: 112px; position: absolute; height: 26px; width: 66px;";
id="go" value="GO" onmouseover="true" title="Click here to get details."/>

<asp:label id="Label1" runat="server" text="to Date">

style="z-index: 1; top: 116px; position: absolute;font-family: 'Tahoma'; left:474px;" Font-Bold="True"
ForeColor="#006697" Font-Size="Small">

<asp:label id="Label2" runat="server" text="from Date">

style="z-index: 1; left: 168px; top: 116px; position: absolute; font-family: 'Tahoma'; width: 101px;" Font-Bold="True"
ForeColor="#006697" Font-Size="Small">

CS PAGE

using System;
using System.Data;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
using MySql.Data.MySqlClient;
using System.Web.Script.Serialization;

public partial class Default6 : System.Web.UI.Page
{
   
    protected void Page_Load(object sender, EventArgs e)
    {
       
    }

    [WebMethod]
    //public static string GetData(int userid)
    public static List<Data> GetData()
    {
       
        List<Data> dataList = new List<Data>();

        MySqlConnection con = new MySqlConnection("Server=localhost;Port=3306;Database=projecttt;UID=root;Pwd=techsoft;pooling=false");
        string s = string.Empty;
        s = "select name,marks from jqchart";
        //string s1= "select count(name) from jqchart"; 
        //int s2 = Convert.ToInt32(s1);
        {
            MySqlCommand cmd = new MySqlCommand(s, con);
            {
                con.Open();
                cmd.ExecuteNonQuery();
                //string name;
                //int marks;
                MySqlDataReader dr = cmd.ExecuteReader();
                while (dr.Read())
                //for (int i = 0; i < s2; i++)
                {
                    string a=dr[0].ToString();
                    string b = dr[1].ToString();
                    dataList.Add(new Data(a,int.Parse(b)));
                      
                }

                return dataList;
            
            }
           
        }        
       
    }
    public class Data
    {
        public string ColumnName = "";
        public int Value = 0;

        public Data(string columnName, int value)
        {
            ColumnName = columnName;
            Value = value;
        }
    }
}

Error 54 'charttype.MyMethod()': not all code paths return a value

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