DetailsView - Won't switch to Edit mode if databinding programmatically

**Mark Stafford** · Aug 28 '06, 11:55 PM

Re: DetailsView - Won't switch to Edit mode if databinding programmaticall y

I figured it out. If you use a ObjectDataSourc e but don't provide
UpdateMethod, the ItemUpdating event is still fired so you can update
your db using the e.NewValues passed at the event params. The trick is
to cancel the update using e.Cancel and then call
ChangeMode(Deta ilsViewMode.Rea dOnly) to change it back to normal view.
If you don't cancel the update, the DetailsView will attempt to find an
UpdateMethod in the ObjectDataSourc e and will blow up. But I have
tested this method and it works.

Here is the code:

DetailsViewTest .aspx
-----------------------------------------------------------------------------------
<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt d">

<script runat="server">

protected void Page_Load(objec t sender, EventArgs e)
{
if (!IsPostBack)
{
for (int n = 1; n <= 7; n++)
{
BoundField bf = new BoundField();
bf.DataField = "Column" + n;
bf.HeaderText = "Col " + n;
dvTest.Fields.A dd(bf);
}

CommandField cf = new CommandField();
cf.ShowEditButt on = true;

dvTest.Fields.A dd(cf);

//dvTest.DataSour ce = DataProvider.Ge tData();
//dvTest.DataBind ();
}
}

protected void dvTest_ModeChan ging(object sender,
DetailsViewMode EventArgs e)
{

}

protected void dvTest_ModeChan ged(object sender, EventArgs e)
{

}

protected void dvTest_ItemUpda ting(object sender,
DetailsViewUpda teEventArgs e)
{
DataProvider.Up dateData(e.NewV alues);

e.Cancel = true;
dvTest.ChangeMo de(DetailsViewM ode.ReadOnly);
}

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitl ed Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DetailsVie w ID="dvTest" runat="server" AutoGenerateRow s="False"
DataSourceID="d sData"
OnItemUpdating= "dvTest_ItemUpd ating"
OnModeChanged=" dvTest_ModeChan ged"
OnModeChanging= "dvTest_ModeCha nging">
</asp:DetailsView >
<asp:ObjectData Source ID="dsData" runat="server"
SelectMethod="G etData" TypeName="DataP rovider">
</asp:ObjectDataS ource>
</div>
</form>
</body>
</html>

AppCode/DataProvider.cs
-----------------------------------------------------------------------------------
using System;
using System.Data;
using System.Collecti ons;
using System.Collecti ons.Specialized ;
using System.Web;
using System.Web.UI;

public class DataProvider
{
public static void UpdateData(IOrd eredDictionary newValues)
{
DataTable dt = GetData();
DataRow dr = dt.Rows[0];

foreach (DictionaryEntr y de in newValues)
{
dr[(string) de.Key] = de.Value;
}

HttpContext.Cur rent.Session["TheTable"] = dt;
}

public static DataTable GetData()
{
DataTable dt;
object sdt = HttpContext.Cur rent.Session["TheTable"];

if (sdt == null || !(sdt is DataTable))
{
dt = new DataTable();
dt.Columns.Add( "Column1");
dt.Columns.Add( "Column2");
dt.Columns.Add( "Column3");
dt.Columns.Add( "Column4");
dt.Columns.Add( "Column5");
dt.Columns.Add( "Column6");
dt.Columns.Add( "Column7");

DataRow dr = dt.NewRow();

dr["Column1"] = "Data1";
dr["Column2"] = "Data2";
dr["Column3"] = "Data3";
dr["Column4"] = "Data4";
dr["Column5"] = "Data5";
dr["Column6"] = "Data6";
dr["Column7"] = "Data7";

dt.Rows.Add(dr) ;

HttpContext.Cur rent.Session["TheTable"] = dt;
}
else
{
dt = (DataTable) HttpContext.Cur rent.Session["TheTable"];
}

return dt;
}
}

DetailsView - Won't switch to Edit mode if databinding programmatically

DetailsView - Won't switch to Edit mode if databinding programmatically

Comment