<asp:Label ID="lblMessage" runat="server" Text=""></asp:Label>
<br />
<asp:Button ID="BtnSerialize" runat="server" Text="Serialize List of MyClass and Save it, in viewState"
OnClick="BtnSerialize_Click" />
<asp:Button ID="BtnDeserialize" runat="server" Text="Deserialize ViewState and show in grid"
OnClick="BtnDeserialize_Click" />
<br />
<br />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
روش اول . استفاده از کلاس JavaScriptSerializer
using System.Web.Script.Serialization;
...
protected void BtnSerialize_Click(object sender, EventArgs e)
{
List<MyClass> myTable = new List<MyClass>()
{
new MyClass() { ID = 1, Name = "Amir", Family = "Ajorlo" },
new MyClass() { ID = 2, Name = "Ali", Family = "Sohrabi" },
new MyClass() { ID = 3, Name = "Hesam", Family = "Naderi" }
};
IEnumerable<MyClass> query = from row in myTable
where row.ID <= 2
select row;
JavaScriptSerializer serializer = new JavaScriptSerializer();
string serialize = serializer.Serialize(query);
ViewState["serialize"] = serialize;
lblMessage.Text = "Serialize Value is: " + serialize;
}
protected void BtnDeserialize_Click(object sender, EventArgs e)
{
if (ViewState["serialize"] != null)
{
JavaScriptSerializer deserializer = new JavaScriptSerializer();
List<MyClass> myTable = deserializer.Deserialize<List<MyClass>>((string)ViewState["serialize"]);
GridView1.DataSource = myTable;
GridView1.DataBind();
}
else
{
lblMessage.Text = "Please First click the BtnSerialize";
}
}
public class MyClass
{
public int ID { get; set; }
public string Name { get; set; }
public string Family { get; set; }
}
روش دوم . استفاده از کلاس ObjectStateFormatter . تو این حالت SerializableَAttribute باید قبل از کلاس قرار بگیره [Serializable]
protected void BtnSerialize_Click(object sender, EventArgs e)
{
List<MyClass> myTable = new List<MyClass>()
{
new MyClass() { ID = 1, Name = "Amir", Family = "Ajorlo" },
new MyClass() { ID = 2, Name = "Ali", Family = "Sohrabi" },
new MyClass() { ID = 3, Name = "Hesam", Family = "Naderi" }
};
IEnumerable<MyClass> query = from row in myTable
where row.ID <= 2
select row;
ObjectStateFormatter serializer = new ObjectStateFormatter();
string serialize = serializer.Serialize(query.ToList<MyClass>());
ViewState["serialize"] = serialize;
lblMessage.Text = "Serialize Value is: " + serialize;
}
protected void BtnDeserialize_Click(object sender, EventArgs e)
{
if (ViewState["serialize"] != null)
{
ObjectStateFormatter deserializer = new ObjectStateFormatter();
List<MyClass> myTable = (List<MyClass>)deserializer.Deserialize((string)ViewState["serialize"]);
GridView1.DataSource = myTable;
GridView1.DataBind();
}
else
{
lblMessage.Text = "Please First click the BtnSerialize";
}
}
}
[Serializable]
public class MyClass
{
public int ID { get; set; }
public string Name { get; set; }
public string Family { get; set; }
}