I am working on an application process. There is an application and on it there are courses. On my submit application page I have a grid which is not bound to a sql data source. When i click submit application, I insert a master record for the application and I want to loop through the grid rows and get the course information. I would like to use a grid not bound to a sql data source and use the built in editforms (i know how to override row inserting and row updating). Now, I have no problems doing all of these functions with a sqldatasource bound grid. But I want to use this grid to display data which has not yet hit the database. What is the best way to go about this..I just need a push in the right direction.

So far ive tried:

Grid bound to a datatable
Datatable persists in viewstate
EnableCallbacks on grid set to false

This works, however, by setting EnableCallbacks to false, the edit forms dont persist data.
And if i set EnableCallbacks to true, I can't update the ViewState datatable (Cant update viewstate on callback, I read this somewhere on the forum)
(I am using the Row_Validating event and setting e.RowError to an error message if validation fails)

Please advise.

-Mark

I am now binding to a binding list. And i can keep enable callbacks set to true. Im trying to use session to store the list.

//IN PAGE LOAD

if (Session["courseList"] == null)
            lst = new BindingList<IndApplicationCourseGuid>();
 else
            lst = (BindingList<IndApplicationCourseGuid>)Session["courseList"];
 dvCourses.DataSource = lst;
 dvCourses.DataBind();

Sometimes i get the above error: Unable to cast object of type 'System.ComponentModel.BindingList`1[IndApplicationCourseGuid]' to type 'System.ComponentModel.BindingList`1[IndApplicationCourseGuid]'.

I know this isnt the controls fault, and something on the server must be going wrong. But is there anyway I can get the control to persist my lst object between callbacks/postbacks so that I don't have to lookup session and cast?

-Mark

Ok. I have the grid being bound properly and the inserts/deleting working. However when i try to update I get:

Multiple controls with the same ID 'DXDataRow0' were found. FindControl requires that controls have unique IDs

I've heard this can be caused by a KeyFieldName column having multiple values, but this happens when I have only 1 row.

Here is my INSERT code:

IndApplicationCourseGuid course = new IndApplicationCourseGuid();
course.Guid = Guid.NewGuid();
course.Name = courseName.Text;
course.Coursestartdate = startDate.Date;
course.Courseenddate = endDate.Date;
course.Fee = Convert.ToDouble(courseFee.Text);
lst.Add(course);
Session["courseList"] = lst;
BindGrid();
grid.CancelEdit();

  private void BindGrid(){
        if (Session["courseList"] == null)
            lst = new BindingList<IndApplicationCourseGuid>();
        else
            lst = (BindingList<IndApplicationCourseGuid>)Session["courseList"];
        dvCourses.DataSource = lst;
        dvCourses.KeyFieldName = "Guid";
        dvCourses.DataBind();
    }

//ASPX

 <dxwgv:ASPxGridView ID="dvCourses" runat="server" KeyFieldName="Guid"
        CssFilePath="~/App_Themes/Aqua/{0}/styles.css" CssPostfix="Aqua"
        Width="100%" AutoGenerateColumns="False" onrowdeleting="dvCourses_RowDeleting1"
                onrowinserting="dvCourses_RowInserting1"
                onrowvalidating="dvCourses_RowValidating1"
                onhtmlrowcreated="dvCourses_HtmlRowCreated"
                onrowupdating="dvCourses_RowUpdating1">
        <Columns>
        <dxwgv:GridViewCommandColumn Name="colCommands" VisibleIndex="0">
        <NewButton Visible="true"></NewButton>
        <EditButton Visible="true"></EditButton>
        <DeleteButton Visible="true"></DeleteButton>
        </dxwgv:GridViewCommandColumn>
        <dxwgv:GridViewDataTextColumn Name="Guid" FieldName="Guid">
        </dxwgv:GridViewDataTextColumn>
          <dxwgv:GridViewDataTextColumn Name="colCourseName" FieldName="Name" Caption="Course Name" VisibleIndex="1">
            </dxwgv:GridViewDataTextColumn>
            <dxwgv:GridViewDataTextColumn Name="colStartDate" FieldName="Coursestartdate" Caption="Start Date" VisibleIndex="3" PropertiesTextEdit-DisplayFormatString="d">
                <PropertiesTextEdit DisplayFormatString="d">
                </PropertiesTextEdit>
            </dxwgv:GridViewDataTextColumn>
            <dxwgv:GridViewDataTextColumn Name="colEndDate" FieldName="Courseenddate" Caption="End Date" VisibleIndex="4" PropertiesTextEdit-DisplayFormatString="d">
                <PropertiesTextEdit DisplayFormatString="d">
                </PropertiesTextEdit>
            </dxwgv:GridViewDataTextColumn>
            <dxwgv:GridViewDataTextColumn Name="colFee" FieldName="Fee" Caption="Fee" VisibleIndex="5">
                <PropertiesTextEdit DisplayFormatString="C">
                </PropertiesTextEdit>
            </dxwgv:GridViewDataTextColumn> 
        </Columns>

I'm clueless as to why this is happening, and an answer to this would help me finish this module.
Slowly, but surely. Any help would be greatly appreciated.

-Mark

Hello there Mark, 

Did you find a solution? 

We have a similar situation,

Thank u in advance!

Regards