CODEWITHSUNDEEP
c#asp.net
Ishan
Ishan

Reputation: 4028

Problem in variable declaration

On page load i am setting the value of String variable DB as follows:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
     String DB = "";
     DB = Session["db"].ToString();
    }
}

I want to use the variable DB (i want to pass this value to a method getpet()) in another method which is:

protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
    if(DropDownList2.SelectedItem.Text=="0")
    {
         petres d = new petres();
         String petitioner=d.getpet();
    }
}

How can i use a variable declared in one method, in another method?

Upvotes: 0

Views: 409

Answers (3)

Babar
Babar

Reputation: 2826

Declare the variable at Page scope. Like this.

<%@ Page Language="C#" Debug="true" %>
<script runat="server">

    String DB = null;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
         String DB = "";
         DB = Session["db"].ToString();
        }
    }


    protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
        if(DropDownList2.SelectedItem.Text=="0")
        {
            petres d = new petres();
            String petitioner=d.getpet();
        }
    }

</script>
<html>
<head>
    ...
</head>
<body>
...
</body>
</html>

Upvotes: 1

dhoelzgen
dhoelzgen

Reputation: 1150

If you declare a variable within a method's scope, you cannot access it from outside this scope. Try declaring it at class level, and assigning the value in your method.

class YourClass {

  protected String DB = "";

  protected void firstMethod() {
    DB = "whatever you want";
  }

  protected void secondMethod() {
    Console.writeln(DB);
  }
}

Upvotes: 0

Kangkan
Kangkan

Reputation: 15571

This issue is due to scope resolution for the variable. If you need a variable in all the methods in a class, declare it at the class level.

For your case, you can declare it at class level and assign a value in the Page_load and then use it elsewhere.

Upvotes: 0

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