Using a DropDownList in a FormView with ObjectDataSourc e

[J055]

Hi

I thought I was trying to do something very simple but I'm have a lot of
trouble trying to do the following.

<asp:FormView ID="fvGroups" runat="server" DataKeyNames="G roupID"
DataSourceID="o dsGroups"
DefaultMode="In sert" Visible="false" OnItemCommand=" fvGroups_ItemCo mmand">
<InsertItemTemp late>
<asp:DropDownLi st ID="ddlEditMode " runat="server"
OnInit="ddlEdit Mode_Init" SelectedValue=' <%# Bind("EditMode" ) %>'>
<asp:ListItem Selected="True" Value="0" Text="Select... " ></asp:ListItem>
</asp:DropDownLis t>
</InsertItemTempl ate>
</asp:FormView>

....

protected void ddlEditMode_Ini t(object sender, EventArgs e)
{
DropDownList ddlEditMode = sender as DropDownList;
ddlEditMode.Ena bleViewState = false;
ddlEditMode.App endDataBoundIte ms = true;
ddlEditMode.Dat aSource = myList; // an OrderedDictiona ry object
ddlEditMode.Dat aTextField = "value";
ddlEditMode.Dat aValueField = "key";
// Bind the data to the control.
ddlEditMode.Dat aBind();
}

When I add SelectedValue=' <%# Bind("EditMode" ) %>'to the DroupDownList I
get this error.

"System.Invalid OperationExcept ion: Databinding methods such as Eval(),
XPath(), and Bind() can only be used in the context of a databound control."

I just want to save the value to the ObjectDataSourc e InsertParameter s.
Surely this is a very standard requirement?

Thanks
Andrew

[Mohamed Mosalem]

Hi,
In the insert mode you won't need to use <%# Bind("") %because you are
inserting new item so no data to bind to.
all you have to do is to configure the data source to have a control
parameter in its insert parameters that points to the drop down list.

Hope this helps.
Regards,
Mohamed Mosalem


"J055" wrote:

Hi

I thought I was trying to do something very simple but I'm have a lot of
trouble trying to do the following.

<asp:FormView ID="fvGroups" runat="server" DataKeyNames="G roupID"
DataSourceID="o dsGroups"
DefaultMode="In sert" Visible="false" OnItemCommand=" fvGroups_ItemCo mmand">
<InsertItemTemp late>
<asp:DropDownLi st ID="ddlEditMode " runat="server"
OnInit="ddlEdit Mode_Init" SelectedValue=' <%# Bind("EditMode" ) %>'>
<asp:ListItem Selected="True" Value="0" Text="Select... " ></asp:ListItem>
</asp:DropDownLis t>
</InsertItemTempl ate>
</asp:FormView>

....

protected void ddlEditMode_Ini t(object sender, EventArgs e)
{
DropDownList ddlEditMode = sender as DropDownList;
ddlEditMode.Ena bleViewState = false;
ddlEditMode.App endDataBoundIte ms = true;
ddlEditMode.Dat aSource = myList; // an OrderedDictiona ry object
ddlEditMode.Dat aTextField = "value";
ddlEditMode.Dat aValueField = "key";
// Bind the data to the control.
ddlEditMode.Dat aBind();
}

When I add SelectedValue=' <%# Bind("EditMode" ) %>'to the DroupDownList I
get this error.

"System.Invalid OperationExcept ion: Databinding methods such as Eval(),
XPath(), and Bind() can only be used in the context of a databound control."

I just want to save the value to the ObjectDataSourc e InsertParameter s.
Surely this is a very standard requirement?

Thanks
Andrew

[J055]

Hi Mohamed

I thought a ControlParamete r would work but if I add one to the
ObjectDataSourc e with 'ddlEditMode' as the ControlID I get a 'can't find the
Control' error.

Any ideas?

Thanks
Andrew

"Mohamed Mosalem" <Mo************ @discussions.mi crosoft.comwrot e in
message news:85******** *************** ***********@mic rosoft.com...

Hi,
In the insert mode you won't need to use <%# Bind("") %because you are
inserting new item so no data to bind to.
all you have to do is to configure the data source to have a control
parameter in its insert parameters that points to the drop down list.

Hope this helps.
Regards,
Mohamed Mosalem


"J055" wrote:

>Hi

I thought I was trying to do something very simple but I'm have a lot of
trouble trying to do the following.

<asp:FormVie w ID="fvGroups" runat="server" DataKeyNames="G roupID"
DataSourceID=" odsGroups"
DefaultMode="I nsert" Visible="false"
OnItemCommand= "fvGroups_ItemC ommand">
<InsertItemTem plate>
<asp:DropDownL ist ID="ddlEditMode " runat="server"
OnInit="ddlEdi tMode_Init" SelectedValue=' <%# Bind("EditMode" ) %>'>
<asp:ListIte m Selected="True" Value="0" Text="Select... " ></asp:ListItem>
</asp:DropDownLis t>
</InsertItemTempl ate>
</asp:FormView>

....

protected void ddlEditMode_Ini t(object sender, EventArgs e)
{
DropDownList ddlEditMode = sender as DropDownList;
ddlEditMode.En ableViewState = false;
ddlEditMode.Ap pendDataBoundIt ems = true;
ddlEditMode.Da taSource = myList; // an OrderedDictiona ry object
ddlEditMode.Da taTextField = "value";
ddlEditMode.Da taValueField = "key";
// Bind the data to the control.
ddlEditMode.Da taBind();
}

When I add SelectedValue=' <%# Bind("EditMode" ) %>'to the DroupDownList
I
get this error.

"System.Invali dOperationExcep tion: Databinding methods such as Eval(),
XPath(), and Bind() can only be used in the context of a databound
control."

I just want to save the value to the ObjectDataSourc e InsertParameter s.
Surely this is a very standard requirement?

Thanks
Andrew

[Mohamed Mosalem]

Try the following code in the ItemInserting event handler of the form view
protected void fvGroups_ItemIn serting(object sender, FormViewInsertE ventArgs
e)
{

e.Values["EditMode"]=((DropDownList )FormView1.Row. FindControl("dd lEditMode")).Se lectedValue ;
}
"J055" wrote:

Hi Mohamed

I thought a ControlParamete r would work but if I add one to the
ObjectDataSourc e with 'ddlEditMode' as the ControlID I get a 'can't find the
Control' error.

Any ideas?

Thanks
Andrew

"Mohamed Mosalem" <Mo************ @discussions.mi crosoft.comwrot e in
message news:85******** *************** ***********@mic rosoft.com...

Hi,
In the insert mode you won't need to use <%# Bind("") %because you are
inserting new item so no data to bind to.
all you have to do is to configure the data source to have a control
parameter in its insert parameters that points to the drop down list.

Hope this helps.
Regards,
Mohamed Mosalem


"J055" wrote:

Hi

I thought I was trying to do something very simple but I'm have a lot of
trouble trying to do the following.

<asp:FormView ID="fvGroups" runat="server" DataKeyNames="G roupID"
DataSourceID="o dsGroups"
DefaultMode="In sert" Visible="false"
OnItemCommand=" fvGroups_ItemCo mmand">
<InsertItemTemp late>
<asp:DropDownLi st ID="ddlEditMode " runat="server"
OnInit="ddlEdit Mode_Init" SelectedValue=' <%# Bind("EditMode" ) %>'>
<asp:ListItem Selected="True" Value="0" Text="Select... " ></asp:ListItem>
</asp:DropDownLis t>
</InsertItemTempl ate>
</asp:FormView>

....

protected void ddlEditMode_Ini t(object sender, EventArgs e)
{
DropDownList ddlEditMode = sender as DropDownList;
ddlEditMode.Ena bleViewState = false;
ddlEditMode.App endDataBoundIte ms = true;
ddlEditMode.Dat aSource = myList; // an OrderedDictiona ry object
ddlEditMode.Dat aTextField = "value";
ddlEditMode.Dat aValueField = "key";
// Bind the data to the control.
ddlEditMode.Dat aBind();
}

When I add SelectedValue=' <%# Bind("EditMode" ) %>'to the DroupDownList
I
get this error.

"System.Invalid OperationExcept ion: Databinding methods such as Eval(),
XPath(), and Bind() can only be used in the context of a databound
control."

I just want to save the value to the ObjectDataSourc e InsertParameter s.
Surely this is a very standard requirement?

Thanks
Andrew

[Walter Wang [MSFT]]

Hi Andrew,

A control added in an item template will have to be referenced using
FindControl just as Mohamed showed in his code. That's why ObjectDataSourc e
will complain about can't find the control.

I think Mohamed's suggestion will work for you; please let us know your
result so that we can further follow up. Thank you.

Sincerely,
Walter Wang (wa****@online. microsoft.com, remove 'online.')
Microsoft Online Community Support

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