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c#multithreadingformsuser-interfaceinvalidoperationexception
EnginBekar
EnginBekar

Reputation: 43

System.InvalidOperationException setting texbox text

I am using one thread running this code:

try
{
    Form1 f = getForm<Form1>();
    f.changePrice(price);
}
catch (Exception e)
{
    Console.WriteLine("error: " + e);
}

Here is the changePrice method:

public void changePrice(Int32 price)
{
   txtPrice.Text = ""+price;
}

I want to add text to my textbox "txtPrice".

Upvotes: 0

Views: 1667

Answers (2)

Friis1978
Friis1978

Reputation: 1163

You should change your textbox text at runtime like this.

public void changePrice(Int32 price)
    {
        if (InvokeRequired)
        {
            this.Invoke(new Action<Int32>(changePrice), new object[] { price });
            return;
        }

        txtPrice.Text = ""+ price;          
    }

This will do the trick.

Upvotes: 1

Ehsan Sajjad
Ehsan Sajjad

Reputation: 62498

convert it to string as Text property is of type string:

public void changePrice(Int32 price)
{
   txtPrice.Text = price.ToString();

}

Upvotes: 1

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