System.Reflection GetValue method
-
Hello all. I need some assistance. If I have a form that has buttons (or any Control(s)) on it, and I want to be able to populate a datagridview at runtime by selecting the control name from a combobox, how do you call the GetValue(object, object[] index) method on it to get the value of the property. I have no problem getting the list of property names, but I cannot get the values!:mad: This code works. All but the GetValue method. I keep getting a 'TargetException: Object does not match target type' error. Please give me a code example of how to properly call this GetValue(object, object[] index) method. Once again, The method that updates the gridview(right now it is a textbox in this code; I will change it later) and the class that handles the properties: private void myCboBox_SelectedIndexChanged(object sender, EventArgs e) { MyProperty Myproperty = new MyProperty(null, null); //creates an int to hold the selected index: int index = myCboBox.SelectedIndex; //creates a type variable: Type t = controls[index].GetType(); PropertyInfo[] myProps = t.GetProperties(); foreach (PropertyInfo p in myProps) { richTextBox1.Text += "\n" + //This GetValue(object, object[] index) //is what I need to know how to do: p.Name + "\t\t\t\t" + p.GetValue(Myproperty, null); } } } public class MyProperty { public MyProperty(string aName, object aValue) { theName = aName; theValue = aValue; } private string theName; public string theNameProp { get { return theName; } set { theName = value; } } private object theValue; public object intTest2 { get { return theValue; } set { theValue = value; } } } "If you don't know where you're going, you'll probably end up somewhere else." Yogi Berra
-
Hello all. I need some assistance. If I have a form that has buttons (or any Control(s)) on it, and I want to be able to populate a datagridview at runtime by selecting the control name from a combobox, how do you call the GetValue(object, object[] index) method on it to get the value of the property. I have no problem getting the list of property names, but I cannot get the values!:mad: This code works. All but the GetValue method. I keep getting a 'TargetException: Object does not match target type' error. Please give me a code example of how to properly call this GetValue(object, object[] index) method. Once again, The method that updates the gridview(right now it is a textbox in this code; I will change it later) and the class that handles the properties: private void myCboBox_SelectedIndexChanged(object sender, EventArgs e) { MyProperty Myproperty = new MyProperty(null, null); //creates an int to hold the selected index: int index = myCboBox.SelectedIndex; //creates a type variable: Type t = controls[index].GetType(); PropertyInfo[] myProps = t.GetProperties(); foreach (PropertyInfo p in myProps) { richTextBox1.Text += "\n" + //This GetValue(object, object[] index) //is what I need to know how to do: p.Name + "\t\t\t\t" + p.GetValue(Myproperty, null); } } } public class MyProperty { public MyProperty(string aName, object aValue) { theName = aName; theValue = aValue; } private string theName; public string theNameProp { get { return theName; } set { theName = value; } } private object theValue; public object intTest2 { get { return theValue; } set { theValue = value; } } } "If you don't know where you're going, you'll probably end up somewhere else." Yogi Berra
When using
GetValue, you must pass an object of the same type that you used to create thePropertyInfoobject. So this should work:p.GetValue(controls[index], null);Then you can fill the MyProperty object if you need to.Hesham A. Amin My blog