I have an edit page with a Html.DropDownList in it.... I place the value in textbox but i cant show the dropdownlist value it always shows up with Select... Any suggestion how it can be done...

        <p>
            <label for="Mat_Name">Mat_Name:</label>
            <%= Html.TextBox("Mat_Name", Model.Mat_Name) %>
            <%= Html.ValidationMessage("Mat_Name", "*") %>
        </p>
        <p>
            <label for="MeasurementTypeId">MeasurementType:</label>
            <%= Html.DropDownList("MeasurementType", "Select")%>
            <%= Html.ValidationMessage("MeasurementTypeId", "*") %>
        </p>