how to print Field name with value of a Class object?

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hi, In C#, I need to print a class field or property name with value without using reflection or string.join method.

For eg.

protected void Button1_Click(object sender, EventArgs e)
    {
        List<EmployeeInfo> obj = new List<EmployeeInfo>();
        obj.Add(new EmployeeInfo { eid = 123 });
        obj.Add(new EmployeeInfo { ename = "abc" });

        Response.Write(obj.ToString()); // output must be  => ename ="abc" , eid = 123
    }

    public class EmployeeInfo
    {
        public string ename;
        public int eid;
    }

It need to be resulted as follows automatically with property name and value :

ename ="abc" , eid = 123

It need to be resulted with good performance and simple way.

Posted 28-Aug-14 19:01pm

Mohan_J

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2 solutions

Solution 2

Manual work is simple, you can use StringBuilder.Append if string.format would get too long.

Also, you could try to implement ISerializable interface (I'm not sure of the exact format of the output you would get, but you would definitely get a string with all the properties.

Posted 28-Aug-14 20:01pm

Sinisa Hajnal

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Raul Iloc · Accepted Answer · 2014-08-28T19:29:00

Solution 1

1.You should overwrite the method ToString() in your EmployeeInfo class:

C#

public class EmployeeInfo
    {
        public string ename;
        public int eid;
        
        public override string ToString()
        {
            return string.Format("ename = \"{0}\" , eid = {1}",
                this.ename,
                this.eid);
        }
    }

2.You should refine/simplify the code from Button1_Click like this:

C#

protected void Button1_Click(object sender, EventArgs e)
    {
        EmployeeInfo obj = new EmployeeInfo { ename= "abc", eid = 123 };
        Response.Write(obj.ToString()); 
    }

Posted 28-Aug-14 19:29pm

Raul Iloc

Comments

Mohan_J 29-Aug-14 1:36am

Without using string.Format, how to achieve this As I am using 100s of properites in a class and more manual work needed(adding property names) for this. Any simple way with good performnce.

Raul Iloc 29-Aug-14 2:01am

Other solution, and the recommended solution for web communication, is to use JSON format, but this format is a little different that your format. See details on the next links:
http://weblogs.asp.net/scottgu/tip-trick-building-a-tojson-extension-method-using-net-3-5
http://dotnet.dzone.com/articles/converting-c-object-json

Mohan_J 1-Sep-14 0:43am

thanks for your great answer. it works for me. ;)

Raul Iloc 1-Sep-14 1:05am

Welcome, I am glad that I could help you!