How can I access a custom property in my webpart?

I have a page that contains webparts, which contains multiple instances of the same custom webpart. I wanted to use the .webpart file to add my own custom property like :

<property name="CustomProperty" type="string">value</property>

so I can treat each webpart according to this value.

I can't seems to get hold of this property. I can access title , description etc. but not my property.

I managed to create a custom property which I can handle while editing the webpart at runtime, but I would like to set it once in the .webpart file.

2 Answers 2


as alex stated,

Also you need to make sure your actualy putting in the values first ;), You need a constant with a value or "" , then the getter setter with that const varible to get and set, you finaly need to add a constructor that contains the private varibles that pass the const to the private:

create your base class:

add const:

//this is your default string
const string c_MyStringDefault = "Sample String";

add private string:

//this will be used internaly through the constructor
private string _myString;

add constructor:

   // Constructor
   public  CustomPropertyWebPart()
    // Initialize private variables.
    _myString = c_MyStringDefault;

add the get/set method

    // Creates a custom property that is a string.
    // This property will be displayed as a text box in the
    // property pane.

    // Create a custom category in the property sheet.
    [Category("Custom Properties")]
    // Assign the default value.
    // Property is available in both Personalization
    // and Customization mode.
    // The caption that appears in the property sheet.
    [FriendlyNameAttribute("Custom String")]
    // The tool tip that appears when pausing the mouse pointer over
    // the friendly name in the property pane.
    [Description("Type a string value.")]
    // Display the property in the property pane.
    // The accessor for this property.
    public string MyString
            return _myString;
            _myString = value;


  • no probs happy to help ;)
    – Ali Jafer
    Commented Apr 4, 2013 at 10:44

In your custom web part create a public property:

public string Value { get; set; }

Then you can access the public property and set it in your CustomWebpart.webpart file.

<?xml version="1.0" encoding="utf-8"?>
  <webPart xmlns="http://schemas.microsoft.com/WebPart/v3">
      <type name="CustomWebpart, $SharePoint.Project.AssemblyFullName$" />
        <property name="Title" type="string">myWebpart</property>
        <property name="Description" type="string">My Visual WebPart</property>
        <property name="Value" type="string">your value</property>
  • Thank you very much, I did as suggested but for some reason I get null for this property even that I set value in it. any suggestions ?
    – Ronen
    Commented Apr 4, 2013 at 8:24
  • Hi Ronen, try adding the [Browsable(false)] attribute to your property, I think it will solve your problem. See an updated code example above. Commented Apr 6, 2013 at 16:32

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