SqlDataSource Insert code behind variable - asp.net

Question

I have the following SqlDataSource
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:orangefreshConnectionString1 %>"
InsertCommand="INSERT INTO [Chat] ([Username], [Message]) VALUES (#Username, #Message)"
SelectCommand="SELECT [Id], [Username], [Message], [Date] FROM [Chat] ORDER BY [Id]" >
<InsertParameters>
<asp:Parameter Name="Message" Type="String" />
<asp:Parameter Name="Date" Type="DateTime" />
<asp:Parameter Name="Username" Type="String" />
</InsertParameters>
</asp:SqlDataSource>
Which controls the following FormView:
<asp:FormView ID="FormView1" runat="server" DefaultMode="Insert"
OnItemInserted="fv_ItemInserted" RenderOuterTable="False"
DataSourceID="SqlDataSource1">
<InsertItemTemplate>
<asp:Panel ID="Panel1" runat="server" DefaultButton="Button1">
<asp:TextBox ID="TextBox1" runat="server" CssClass="chattxtbox"
Text='<%# Bind("Message") %>' autocomplete="off"></asp:TextBox>
<asp:Button ID="Button1" runat="server" CommandName="insert" style="display:none" Text="Button" OnClick="insertUser"/>
</asp:Panel>
</InsertItemTemplate>
</asp:FormView>
I want to be able a variable's content into the Username column, so on Button1 I set the following event: OnClick="insertUser"
protected void insertUser(object sender, EventArgs e)
{
string username1 = User.Identity.Name;
SqlDataSource1.InsertParameters.Add("Username", username1);
SqlDataSource1.Insert();
}
This isn't working though, I don't get any SQL error message at all, is this the right way to do this? And where did I go wrong?

Answer 1

Change Insert Parameter to SessionParameter.
<InsertParameters>
<asp:Parameter Name="Message" Type="String" />
<asp:Parameter Name="Date" Type="DateTime" />
<asp:Parameter Name="Username" Type="String" />
<asp:SessionParameter Name="Username" SessionField="Username" Type="String" />
</InsertParameters>
And in Page_Load handler,
Session["Username"]=User.Identity.Name;

Answer 2

Here you want to declare your parameter as a Control Parameter and then you don't need to assign the value to the parameter in code. You can just call insert.