Trying to wire up dropdownlist in datagrid

[Andy Sutorius via DotNetMonster.com]

Hi,

I am trying to wire up the dropdownlist in a datagrid and use the
onselectedindexchanged event however I am getting an "Object reference not
set to an instance of an object" error when I try to load the page. Do you
see the error?

Thanks,

Andy

<asp:DropDownList ID="ddlType" AutoPostBack="True"
OnSelectedIndexChanged="ddlType_SelectedIndexChang ed" DataSource="<%
#BindTypeDropDown()%>" DataTextField="short_description"
DataValueField="code_value" Runat="server" />

protected System.Web.UI.WebControls.DropDownList ddlType;

private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
this.ddlType.SelectedIndexChanged +=new EventHandler
(ddlType_SelectedIndexChanged); <--Error points to this line
}

protected void ddlType_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Write("hurray");
}

--
Message posted via http://www.dotnetmonster.com

[Elton W]

Hi Andy,

Since you have OnSelectedIndexChanged="ddlType_SelectedIndexChang ed", it
will trigger ddlType_SelectedIndexChanged event. You don't need

this.ddlType.SelectedIndexChanged +=new EventHandler
(ddlType_SelectedIndexChanged);

And in datagrid, there may be many 'ddlType', one in one row.

HTH

Elton Wang
el********@hotmail.com
"Andy Sutorius via DotNetMonster.com" wrote:

Hi,

I am trying to wire up the dropdownlist in a datagrid and use the
onselectedindexchanged event however I am getting an "Object reference not
set to an instance of an object" error when I try to load the page. Do you
see the error?

Thanks,

Andy

<asp:DropDownList ID="ddlType" AutoPostBack="True"
OnSelectedIndexChanged="ddlType_SelectedIndexChang ed" DataSource="<%
#BindTypeDropDown()%>" DataTextField="short_description"
DataValueField="code_value" Runat="server" />

protected System.Web.UI.WebControls.DropDownList ddlType;

private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
this.ddlType.SelectedIndexChanged +=new EventHandler
(ddlType_SelectedIndexChanged); <--Error points to this line
}

protected void ddlType_SelectedIndexChanged(object sender, EventArgs e)
{
Response.Write("hurray");
}

--
Message posted via http://www.dotnetmonster.com