dropdownlist inside a update panel is not updating

Hello,
I have a update panel and inside that panel I have three items, dropdownlist, text box and button.
Dropdownlist is being bound to select statement (SqlDatasource) which retrieve list of boxes borrow by department.
Text box is used to updated the information for person name who returned the box.
Button is used when I want to update the information for a retunbox.in the button event handler I update the status of box from borrow to return with the name of the return person and display the information result to end user for success of failure.

I can see the sauces information on the gui and also see the in the database it is updating.
When I refresh the page it remove that box number from the dropdownlist but not when I click the button to update the information. I have set the trigger for updatepanel to conditional mode with button click.

I also try to programatically updated the dropdownlist (both when first time it load the page and on clicking the button) but it still didn't work.

Any help would be really appreciated.

Thanks

F5 refresh doesnot support in Ajax and there is no need for the trigger as the button is already inside the update panel since all child controls are trigger by default

rohit

Thanks.

But the problem still remains same, dropdownlist is not updated once the button is clicked and it has changed the status from borrowed to retuned in the database. Dropdownlist still show the box number as borrowed box.

I assume your button click calls a function.

In that case try to call the update function of the updatepanel.

e.g. <asp:UpdatePanel ID="MyUpdatePanel" .........

Button Click Function:

MyUpdatePanel.Update();

If it's not working, post your HTML here so others can help.

Aeires.

No, this doesn't work.

Here is the code:

<asp:UpdatePanel ID="updatePanelBorrow" runat="server">
<contenttemplate>

<asp:Panel id = "plborrrow" runat="server">

<asp:DropDownList onblur="ResetColor()" id="ddlQABoxList" onfocus="ChangeColor()" tabIndex=3 runat="server" Width="154px" ToolTip="Select SafeGuard No to Borrow it" AppendDataBoundItems="True" CausesValidation="True"><asp:ListItem Value="-1">Choose a SafeGuard</asp:ListItem></asp:DropDownList>

<asp:Textbox id="txtname" runat="server"/>

<asp:Button id="btnSaveBorrow" tabIndex=8 onclick="btnSaveBorrow_Click" runat="server" Text="Save Borrow Info" Width="111px" SkinID="TopPanelSkinID" ToolTip="Update Borrow information for the Safeguard box or QA Box"></asp:Button

</asp:Panel>
</contenttemplate>

</asp:UpdatePanel>

Here is code : first to bind dropdownlist (it is basically box numbers)

public void GetQABoxList()
{
_connection = new SqlConnection(_connString);
//The command object for sql statement
_command = new SqlCommand();
try
{
_connection.Open();
_command.Connection = _connection;
_command.CommandText = "spListOfQABoxes";
_command.CommandType = CommandType.StoredProcedure;

//Execute the insert statemtent

dataAdapter = new SqlDataAdapter();
dataAdapter.SelectCommand = _command;
dataAdapter.TableMappings.Add("Table", "[QA Box]");

DataSet dataset = new DataSet();
dataAdapter.Fill(dataset);

ddlQABoxList.DataSource = dataset.Tables["[QA Box]"].DefaultView;
ddlQABoxList.DataTextField = "boxNo";
ddlQABoxList.DataValueField = "boxNo";
ddlQABoxList.DataBind();

}
catch (Exception exp)
{
Trace.Write(exp.Message);
}
finally
{
_command.Dispose();
_connection.Close();
}
}

Code for button click:

protected void btnSaveBorrow_Click(object sender, EventArgs e)
{
lblMessage.Visible = false;
lblMessage.Text = "";
String boxno = ddlQABoxList.SelectedItem.Text;


_connection = new SqlConnection(_connString);

//The command object for sql statement
_command = new SqlCommand();
try
{
_connection.Open();
_transaction = _connection.BeginTransaction();
_command.Transaction = _transaction;
_command.Connection = _connection;

_command.CommandType = CommandType.StoredProcedure;
_command.CommandText = "spUpdateBorrowBoxInfo";

//Execute the insert statemtent
int val = _command.ExecuteNonQuery();
if (val > 0)
{
plReturn.Visible = false;
lblMessage.Visible = true;
lblMessage.Text = "Borrow information for QA Box # " + boxno + " has been Updated";

// ddlQABoxList.DataSource = dsBorrowBox;
// ddlQABoxList.DataBind();

txtBorrowedName.Text = "";
txtContents.Text = "";
}
_transaction.Commit();
// GetQABoxList();
DataBindDept();
}
catch (Exception exp)
{
lblMessage.Visible = true;
lblMessage.Text = exp.Message.ToString();
Page.SetFocus(ddlQABoxList);
Trace.Write(exp.Message);
}
finally
{
_command.Dispose();
_connection.Close();
}
// GetQABoxList(); use these two lines to enforce to update dropdownlist, NO SUCCESS!
// UpdatePanelAndDDL();
}

it looks like your problem is the dropdown is not refreshing after button click event, for that u need to call GetQABoxList() againg to refresh your dropdown list.

if this is not what you want then please explain your problem more clearly.

Rohit

Well, In the button_Click eventhandler I do call the GetQABoxList() as my primary concern is to get the latest list of qa boxes numbers to bind with dropdownlist. I commnet out this method but it was not working for me.

Thanks

try putting

ddlQABoxList.SelectedIndex = 0 at the end of GetQABoxList() and see if it works for you.

and one thing include

ddlQABoxList.Clear() in the the begining and

ddlQABoxList.SelectedIndex = 0 at the ending

inside the GetQABoxList() subroutine

and make sure there should not be any javascript error shown on ststus bar

i hope it helps

Rohit

Thanks

It work fine with the suggestion you gave.