Hi

I'm a bit new to this but am having a problem with a combo column I have added.  It seems to work fine (TextField value is showing in grid, filter dropdown is displaying TextValue values and filtering is working), until I go to edit a row.

When I do the dropdown in the edit form shows the guid value as selected, selecting any other value will fix the problem, it will show the Text of whatever item I select, clicking save will also work and update the grid field with the new value.  If I hit edit again (on this or any other row) the guid is shown again.

Problem as seen when clicking edit

Markup for the column looks like this:

<dxwgv:GridViewDataComboBoxColumn FieldName="RoleId"

                VisibleIndex="2" Caption="<%$ Resources: GridColumn.Role.Title %>">

                <PropertiesComboBox ValueType="System.Guid" ValueField="RoleId" TextField="RoleName">

                    <ValidationSettings>

                        <RequiredField IsRequired="True" />

                    </ValidationSettings>

                </PropertiesComboBox>

            </dxwgv:GridViewDataComboBoxColumn>

And the datasource for the combo is set during DataBinding like so:

protected override void OnInit(EventArgs e)

    {

        base.OnInit(e);

        ASPxGridView1.DataBinding += new EventHandler(ASPxGridView1_DataBinding);

        ASPxGridView1.RowInserting += new DevExpress.Web.Data.ASPxDataInsertingEventHandler(ASPxGridView1_RowInserting);

        ASPxGridView1.RowUpdating += new DevExpress.Web.Data.ASPxDataUpdatingEventHandler(ASPxGridView1_RowUpdating);

    }

void ASPxGridView1_DataBinding(object sender, EventArgs e)

    {

        GridViewDataComboBoxColumn column = ((GridViewDataComboBoxColumn)(sender as ASPxGridView).Columns["RoleId"]);

        column.PropertiesComboBox.DataSource = (List<RoleInfo>)Session["RoleComboBoxDataSource"];

        column.PropertiesComboBox.TextField = "RoleName";

        column.PropertiesComboBox.ValueField = "RoleId";

    }

Not sure whether it makes a difference but the grid itself is also populated without a DataSourceID:

protected void Page_Load(object sender, EventArgs e)

    {

        DataBind();

    }

public void DataBind()

    {

        if (Session["GroupList"] == null) GetDataSource();

        List<GroupInfo> list = (List<GroupInfo>)Session["GroupList"];

        ASPxGridView1.DataSource = list;

        ASPxGridView1.KeyFieldName = "GroupId";

        ASPxGridView1.AutoGenerateColumns = true;

        ASPxGridView1.EnableRowsCache = false;

        ASPxGridView1.DataBind();

    }

One solution that works fine for me is this :

In the ASPxGridView1_DataBinding event add this code :

(sender as ASPxGridView).Remove((sender as ASPxGridView).Columns["RoleId"]);
GridViewDataComboBoxColumn column =new  GridViewDataComboBoxColumn();
column.FieldName = "RoleId";
column.PropertiesComboBox.DataSource = (List<RoleInfo>)Session["RoleComboBoxDataSource"];
column.PropertiesComboBox.TextField = "RoleName";
column.PropertiesComboBox.ValueField = "RoleId";
(sender as ASPxGridView).Columns.Add(column);

Made no difference unfortunately.

I can't really see why removing and adding the column would help.

Thanks for trying to help though.

 I met the same problem!!

Try setting the properties of the combobox in the CellEditorInitialize event instead.

Using the CellEditorInitialize event didn't work either.

It works for me:

        protected void DataGrid_CellEditorInitialize(object sender, ASPxGridViewEditorEventArgs e)
        {
            if (e.Column.FieldName == "MyGuid")
            {
                Guid key = new Guid(e.Value.ToString());
                ASPxComboBox combobox = (ASPxComboBox)e.Editor;
                for (int i = 0; i < combobox.Items.Count; i++)
                {
                    if (key == (Guid)combobox.Items[i].Value)
                    {
                        combobox.SelectedIndex = i;
                        break;
                    }
                }
            }
        }

That's done the trick.  Didn't realise I needed existing DataBinding code as well as selected item selection on CellEditorInitialize.

Thanks so much