CODEWITHSUNDEEP
c#winformsoopparameters
phadaphunk
phadaphunk

Reputation: 13273

WindowsForm control as a parameter

My question is simple.

I have a method within a class and I want this method to change the text in a TextBox. The TextBox might change during runtime so I'm trying to find a way to pass the TextBox control as parameter when I call the method.

Is this even possible ?

Thanks in advance.

Upvotes: 2

Views: 11975

Answers (3)

Emre Kilinc Arslan
Emre Kilinc Arslan

Reputation: 2189

If you want to use the controls as an argument in the class you need to use their namespaces on the top such as ;

using System.Windows.Forms;

namespace myprojectnamespace
{
    class myClass
    {
        public void myMethod(TextBox mytex, RichTextBox searchStr)
        {
          // ..Codes Here
        }
}

Upvotes: 0

Dhananjay
Dhananjay

Reputation: 3793

Just to add little more to this :

  1. You can pass any class , Interface, delegate , struct to a method as parameter. In your scenario TextBox is a class so you can pass it to method as parameter.

  2. When you pass any reference type (except string) to a Method , no cloning on the passed object is done and changes to passed object will reflect sent object. e,g :

    void  Method1 ()
{
 DataSet ds = new DataSet();
 ..do some opeartion on ds.....          
 Method2(ds);
 ..print details of ds
}

Method2(DataSet myds)
{
 ..do something to ds
}

    You will notice that in in Method1 after calling Method2 the dataset object ds is changed.

  3. For case number 2 above to apply for value types, pass the parameters as ref :

      void Method2(ref int count)
  {
       count = count++;
  }

    Here if you pass any integer to this method then passed integer will result in change.

Upvotes: 2

Thomas Levesque
Thomas Levesque

Reputation: 292375

Yes of course, it's absolutely possible... a control is an object like any other, so it can be passed as a parameter or stored in a variable

void SayHello(TextBox textBox)
{
    textBox.Text = "Hello world";
}

...

SayHello(textBox1);

Upvotes: 6

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