problem about date on which message send is not displayed..

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C#

my table User

Id int

Email varchar(500)
Name varchar(500)


Scrap

Id int
FromId int
ToId int
Message varchar(5000)
SendDate datetime

GetUserScraps.aspx

<div align="justify">
<%#DataBinder .Eval(Container.DataItem,"Message")%>
<br />
 <br />
</div>
<span>Posted On: &nbsp;</span>
<asp:Label ID="lblSendDate" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"SendDate") %>'></asp:Label>

This my front end code

protected void ButtonPostScrap_Click(object sender, EventArgs e)
   {
       if (!object.Equals(Session["Id"], null))
       {
           string postScrap = "Insert INTO Scrap (FromId,ToId,Message) VALUES('" + Session["Id"].ToString() + "','" + Request.QueryString["Id"].ToString() + "','" + TextBoxScrap.Text + "')";
           dbClass.ConnectDataBaseToInsert(postScrap);
          Response.Redirect("UserDetails.aspx?Id=" + Request.QueryString["Id"].ToString());
       }

this is code for displaying in Grid
GetUserScraps.ascx

DataBaseClass dbClass = new DataBaseClass();
    public DataTable dt;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            GetUserScrap(int.Parse(Request.QueryString["Id"].ToString()));
        }
    }
    public void GetUserScrap(int Id)
    {
        string getUserScraps = "SELECT u.Id as UserId,u.Name,u.ImageName,s.FromId,s.ToId,s.Message,s.SendDate,s.ID as ScrapId FROM [User] as u, Scrap as s WHERE u.Id=s.FromId AND s.ToId='" + Request.QueryString["Id"].ToString() + "'";
        dt = dbClass.ConnectDataBaseReturnDT(getUserScraps);
        if (dt.Rows.Count > 0)
        {
            GridViewUserScraps.DataSource = dt;
            GridViewUserScraps.DataBind();
        }
    }

problem is that that how i display date when message is send how i bind it ?
when i insert the message i not insert the date

i only insert FromId,ToId,Message



plz regarding above code