asp.net c# I need to access value of a variable from the variable name stored in another string

Question

Please note:- I already have gone few links answered but they are leading to controls only. I can use objects easily to access into objects, no issues about that. Issue is with variables accessing at runtime. One is directing to variable, but I found it very tough and rigid one. So want to know any simple and easy way.

I have a requirement following:-

Scenario for eg:-

 1. TextBox_mobile is a control object in aspx page
 2. mobile is a variable stored in c# .cs file
 3. I have a 135+ such controls in aspx page and want to store them in variables in .cs file on say submit button.
 4. I have stored in a table having two fields control_objects and against it variable names
 5. So when submitt is fired (click event) I want to run the assigning task with running a process to retriew control names and
variables names and assinging the values of control objects to appropriate variables.

For eg to more going in practical:-

// create a variable to store textbox control
string mobile = "" 
// Text_mobile is a TextBox in aspx page
// A temporary variable to store variable in loop from table 
string var_mobile = "mobile"; // Currently I am hard coding
// now I wish to use this var_mobile to make automatically assign the value into main variable
<<var_mobile>> = TextBox_mobile.Text.Trim();
//and backend it should be actually storing same in earlier mobile variabl
mobile = TextBox_mobile.Text.Trim();

Since I have lot of objects and variables and later to work on variables, I want this to do in a loop like logic at a time instead of assigning them at individual basis.

Is there any such possible in Asp.net C#?

Answer 1

In c# this and all things which require code to interact with data about types and their members declared within assemblies can be achieved using reflection .

To get field using string containing its name you can use method GetField and then call SetValue on FieldInfo returned by GetField .

For example, if you have class named MyClass declared like this

class MyClass
{
    public int myField = 0;
}

You could use following code to set value of myField

MyClass myClass = new MyClass();
string fieldName = "myField";
int valueToSet = 10;

typeof(MyClass).GetField(fieldName).SetValue(myClass, valueToSet);

Answer 2

As per Kacper prompt quick answer, I was able to resolve with his point to point resolution.

CommonClass.cs

public class CommonClass
{
     public string mobile = "";
     public CommonClass()
     {
         //
         // TODO: Add constructor logic here
         //
      }
}

My code in.cs file:-

    string mobile = "";

    CommonClass obj_class = new CommonClass();
    string fieldname = "mobile";
    typeof(CommonClass).GetField(fieldname).SetValue(obj_class, TextBox_mobile.Text);

    mobile = obj_class.mobile.Trim();