GroupsDefaultExpanded="false" problem

[Lasly]

HI
I've a radgrid with group.
I used the property "GroupsDefaultExpanded=false" for close the group, but the property reclose the group any time i try to do any action (example when i click the button for edit)
Can you help me?

[Shinu]

Hi Lasly,

Please check the following code snippet I tried to prevent the closing of group when the edit button is clicked.

ASPX:

<telerik:RadGrid ID="RadGrid1" runat="server" OnNeedDataSource="RadGrid1_NeedDataSource ShowGroupPanel="True" OnGroupsChanging="RadGrid1_GroupsChanging" OnItemCommand="RadGrid1_ItemCommand" AutoGenerateEditColumn="true">
   <ClientSettings AllowDragToGroup="True"></ClientSettings>
   <MasterTableView GroupsDefaultExpanded="false" EditMode="InPlace">
       <GroupByExpressions>
           <telerik:GridGroupByExpression>
               <GroupByFields>
                   <telerik:GridGroupByField FieldName="Group" />
               </GroupByFields>
               <SelectFields>
                   <telerik:GridGroupByField FieldName="Group" />
               </SelectFields>
           </telerik:GridGroupByExpression>
       </GroupByExpressions>
   </MasterTableView>
</telerik:RadGrid>

C#:

public Hashtable Groups
{
    get
    {
        if (ViewState["Groups"] == null)
        {
            Hashtable res = new Hashtable();
            ViewState["Groups"] = res;
            return res;
        }
        return (Hashtable)ViewState["Groups"];
    }
    set
    {
        ViewState["Groups"] = value;
    }
}

protected void Page_Load(object sender, EventArgs e)
{
    RadGrid1.DataBound += new EventHandler(RadGrid1_DataBound);
}

void RadGrid1_DataBound(object sender, EventArgs e)
{
    foreach (GridGroupHeaderItem item in RadGrid1.MasterTableView.GetItems(GridItemType.GroupHeader))
    {
        if (Groups.ContainsKey(item.DataCell.Text))
        {
            item.Expanded = (bool)Groups[item.DataCell.Text];
        }
    }
}
protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{

    DataTable tbl = new DataTable();
    DataColumn col = new DataColumn("ID");
    col.DataType = typeof(int);
    tbl.Columns.Add(col);
    col = new DataColumn("Name");
    col.DataType = typeof(string);
    tbl.Columns.Add(col);
    col = new DataColumn("Group");
    col.DataType = typeof(string);
    tbl.Columns.Add(col);

    int size = 15;
    int maxLen = size.ToString().Length;
    for (int i = 1; i <= size; i++)
    {
        tbl.Rows.Add(new object[] { i, "Name" + i.ToString("D" + maxLen), "Group" + i % 5 });
    }
    RadGrid1.DataSource = tbl;
}
protected void RadGrid1_GroupsChanging(object source, GridGroupsChangingEventArgs e)
{
    Groups.Clear();
    foreach (GridGroupHeaderItem item in RadGrid1.MasterTableView.GetItems(GridItemType.GroupHeader))
    {
        Groups[item.DataCell.Text] = item.Expanded;
    }
}
protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
{
    if (e.CommandName == RadGrid.ExpandCollapseCommandName)
    {
        Groups[((GridGroupHeaderItem)e.Item).DataCell.Text] = !e.Item.Expanded;
    }
}

Thanks,
Shinu.

[Lasly]

Hi  Shinu
Thanks for the reply.
It's work!

But i need to used the radgrid in editmode=editForms, and if i use it in this mode it doesn't work.

[Shinu]

Hi Lasly,

Please try setting the MasterTableView property GroupLoadMode to Client as shown below.

ASPX:

<MasterTableView GroupsDefaultExpanded="false" GroupLoadMode="Client"  EditMode="EditForms">

Thanks,
Shinu.

[Lasly]

Thanks for the reply
The code doesn't work correctly. The property GroupLoadMode="Client" does not execute the event "GroupsChanging". Without the event, the group does not remain opened.

[Shinu]

Hi Lasly,

Unfortunately i couldn't replicate the issue. The GroupsChanging event is firing and the groups remains opened when edit button is clicked.

Thanks,
Shinu. 

[Lasly]

Hi

For more information, I attach an image with the current situation and another image with my expectations.

Thanks

[Eyup]

Hi Lasly,

You could try to implement the approach provided in the following code-library:
http://www.telerik.com/community/code-library/aspnet-ajax/grid/persist-groups-expanded-state-on-rebind.aspx

I hope this will prove helpful.

Greetings,
Eyup
the Telerik team

[Lasly]

Thank you,

But the solution that you suggest me is the same that Shinu suggested me previously and it isn't the suitable one to solve the problem in my situation.

[Eyup]

Hi Lasly,

If the suggested approach does not work as expected on your side, please open a support ticket and send us a sample runnable application demonstrating the problematic behavior. Or provide us the exact steps to reproduce the issue locally. Thus, we will be able to further analyze the issue and provide a proper solution.

Looking forward to your reply.

All the best,
Eyup
the Telerik team

[Shinu]

Hi Lasly,

Please try the following code snippet when GroupsDefaultExpanded is set to false.

ASPX:

<telerik:RadGrid ID="RadGrid1" runat="server" OnNeedDataSource="RadGrid1_NeedDataSource" AllowSorting="true" ShowGroupPanel="True" OnGroupsChanging="RadGrid1_GroupsChanging" OnItemCommand="RadGrid1_ItemCommand" AutoGenerateEditColumn="true" OnPreRender="RadGrid1_PreRender">
    <ClientSettings AllowDragToGroup="True">
    </ClientSettings>
    <MasterTableView GroupsDefaultExpanded="false" GroupLoadMode="Client" EditMode="EditForms">
        <GroupByExpressions>
            <telerik:GridGroupByExpression>
                <GroupByFields>
                    <telerik:GridGroupByField FieldName="Group" />
                </GroupByFields>
                <SelectFields>
                    <telerik:GridGroupByField FieldName="Group" />
                </SelectFields>
            </telerik:GridGroupByExpression>
        </GroupByExpressions>
    </MasterTableView>
</telerik:RadGrid>

C#:

public Hashtable Groups
{
    get
    {
        if (ViewState["Groups"] == null)
        {
            Hashtable res = new Hashtable();
            ViewState["Groups"] = res;
            return res;
        }
        return (Hashtable)ViewState["Groups"];
    }
    set
    {
        ViewState["Groups"] = value;
    }
}

protected void Page_Load(object sender, EventArgs e)
{
    RadGrid1.DataBound += new EventHandler(RadGrid1_DataBound);
}

void RadGrid1_DataBound(object sender, EventArgs e)
{
    foreach (GridGroupHeaderItem item in RadGrid1.MasterTableView.GetItems(GridItemType.GroupHeader))
    {
        if (Groups.ContainsKey(item.DataCell.Text))
        {
            item.Expanded = (bool)Groups[item.DataCell.Text];
        }
    }
}

protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{

    DataTable tbl = new DataTable();
    DataColumn col = new DataColumn("ID");
    col.DataType = typeof(int);
    tbl.Columns.Add(col);
    col = new DataColumn("Name");
    col.DataType = typeof(string);
    tbl.Columns.Add(col);
    col = new DataColumn("Group");
    col.DataType = typeof(string);
    tbl.Columns.Add(col);

    int size = 15;
    int maxLen = size.ToString().Length;
    for (int i = 1; i <= size; i++)
    {
        tbl.Rows.Add(new object[] { i, "Name" + i.ToString("D" + maxLen), "Group" + i % 5 });
    }
    RadGrid1.DataSource = tbl;
}
protected void RadGrid1_GroupsChanging(object source, GridGroupsChangingEventArgs e)
{
    Groups.Clear();
    foreach (GridGroupHeaderItem item in RadGrid1.MasterTableView.GetItems(GridItemType.GroupHeader))
    {
        Groups[item.DataCell.Text] = item.Expanded;
    }
}
protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
{
    if (e.CommandName == RadGrid.ExpandCollapseCommandName)
    {
        Groups[((GridGroupHeaderItem)e.Item).DataCell.Text] = !e.Item.Expanded;
    }
    if (e.CommandName == RadGrid.EditCommandName && RadGrid1.MasterTableView.GroupByExpressions.Count > 0)
        group = e.Item.GroupIndex.Substring(0, e.Item.GroupIndex.LastIndexOf("_"));
}
protected void Button1_Click(object sender, EventArgs e)
{
    RadGrid1.Rebind();
}
string group = string.Empty;
protected void RadGrid1_PreRender(object sender, EventArgs e)
{
    if (!string.IsNullOrEmpty(group))
    {
        GridItem[] items = RadGrid1.MasterTableView.GetItems(GridItemType.GroupHeader);
        foreach (GridGroupHeaderItem item in items)
            if (item.GroupIndex == group)
                item.Expanded = true;
    }
}

Thanks,
Shinu.

[Lasly]

Thank you all, but I'm   very sad .
I can not solve this problem.  
(when press to save the changes, groups collapse. e.CommandName ="update" and  e.Item.GroupIndex ="")

took me a long time to try to solve it.  
( my personal tests. -with and without GroupsDefaultExpanded  -
  these posts:
  http://www.telerik.com/community/forums/aspnet-ajax/grid/edit-won-t-show-when-using-groupsdefaultexpanded.aspx
  http://www.telerik.com/community/forums/aspnet-ajax/grid/editor-won-t-open-when-groupsdefaultexpanded-is-false.aspx
 http://www.telerik.com/community/forums/aspnet-ajax/grid/expanding-groups-propagates-to-detail-tables-with-grouploadmode- client.aspx
ecc

)
I would just work normally with a RadGrid grouped  with  item not expanded.
The problem is that using editform, filters, sorting etc etc groups collapse.
"This is the default behavior of the GroupsDefaultExpanded property when it's set to False"  But how is that possible? it make no sense :-( :-(


since the proposed approach does not work as expected, I will open a support ticket.

thank you very much