Input string was not in the correct format

Questions & Answers
1

Hi guys anybody know why im getting this error?

FormatException: Input string was not in the correct format
System.Int32.Parse (System.String s) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System/Int32.cs:629)
InternetCalls+c__Iterator2.MoveNext () (at Assets/Scripts/Level/InternetCalls.cs:85)

This is my script but i dont think that the string is in wrong format.

public class InternetCalls : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	public void DoLogin(string User,string Pass)
	{
		WWWForm www = new WWWForm ();
		www.AddField ("user", User);
		www.AddField ("password", Pass);

		WWW w = new WWW ("http://reactivestudios.comuv.com/login.php", www);
		StartCoroutine (Login(w, User));
		GetXp (User);
	}

	public void DoRegister(string User,string Pass, string Name)
	{
		WWWForm www = new WWWForm ();
		www.AddField ("user", User);
		www.AddField ("password", Pass);
		www.AddField ("name", Name);
		
		WWW w = new WWW ("http://reactivestudios.comuv.com/register.php", www);
		StartCoroutine (Reg(w));
	}

	IEnumerator Reg (WWW w)
	{
		yield return w;
		if(w.error == null)
			{
				//PlayerPrefs.SetString("name", User);
			Debug.Log ("Working");
			Debug.Log (w.text.ToString());
			}
	}

	IEnumerator Login (WWW w, string User)
	{
		yield return w;
		if(w.error == null)
		{
			if(w.text == "login-SUCCESS")
			{
				PlayerPrefs.SetString("name",User);
				Debug.Log ("Working");
				Application.LoadLevel(1);
			}
		}
		else
		{
			Debug.Log ("Error:" + w.error.ToString());
		}
	}

	public void GetXp(string User)
	{
		WWWForm www = new WWWForm ();
		www.AddField ("user", User);
		WWW w = new WWW ("www.reactivestudios.comuv.com/Exp.php",www);
		StartCoroutine (Xp (w));
		Debug.Log ("Got Exp");
	}
	IEnumerator Xp(WWW w)
	{
		yield return w;
		if(w.error == null)
		{
			//PlayerPrefs.SetString("name", User);
			Debug.Log ("Getting Xp for Stats");
			Debug.Log (w.text);
			Debug.Log ("Working Stats");
			PlayerPrefs.SetInt("xp",int.Parse(w.text));
			Debug.Log ("Get xp Worked Stats");
		}
		else
		{
			Debug.Log ("Error: " + w.error.ToString());
	}
	}
}
2

Parse it first before saving? Use tryparse if input might be wrong.

int gg = int.Parse(w.text);
PlayerPrefs.SetInt("xp",gg);

//or doing this might work, worth a try :)

(int.Parse(w.text))