Thanks, Rado.

I have tried Header template, and faced with sorting problem. No arrows, no server events when I click on column's header.  As I undestand I have to imlement it by myself?

May be there is some way to implement it using multi header? Or some way to change rendering of first row?

Hello Alexander,

I have changed  the code for the example in this way and it works fine.

    private void Page_Load(object sender, System.EventArgs e)
        {
            // If there is a query string, then this is a custom AJAX call, which means that the user has changed a
            // DropDownList selection from the Dropdown.

         if (!Page.IsPostBack){
           
            if (Request.QueryString.Count > 0)
            {
                // Filter the DataView
                applyFilterOnDataView();
                isFiltering = true;
            }

           }

        }

I think that you need to handle in your code this condition to recreate the headers when postback is made in UltraWebGrid1_InitializeDataSource1 method for reference see the  sample.

 else if (this.IsPostBack && !this.UltraWebGrid1.IsXmlHttpRequest)
            {
                // 1: Get the DataView from the session state
                DataView dv = (DataView)Session["GridDataSource"];

                // 2: Create templated columns for DropDownLists to show in each header
                createDropDownsForRowFiltering(dv);

                // Since we want the DropDownLists for the header template, we will create all columns in code
                this.UltraWebGrid1.DisplayLayout.AutoGenerateColumns = false;
            }

I hope this will help you.

Rado,

Developer support team

Infragistics

Add one additional question:

If I do data binding  in PreRender method my template controls loose their state.  Probably it is because state is restored from ViewState after Page_Load but before PreRender. Is anyway to load it by force?

void Page_Load()
{
InitColumns();
}

void Page_PreRender() //controls state is not restored

{

m_grid.DataSource = ds.Tables[0].DefaultView;
m_grid.DataBind();

}

Thanks, Rado!

I have investigated you sample, and faced with following problem:

I dynamically generate columns the same method as in you sample.

The problem is following:

When I do data binding each time all work fine, but if I do binding only on fist request InstantiateIn method did not rised and my column's headers all are empy.

void Page_Load() // Works fine
{
InitColumns();
m_grid.DataSource = ds.Tables[0].DefaultView;
m_grid.DataBind();
}

void Page_Load() //works only on first request
{
 InitColumns();
 If(!IsPostBack)
 {
  m_grid.DataSource = ds.Tables[0].DefaultView;
  m_grid.DataBind();
 }
}

I cannot (don't want) do data binding on each request.

How can I fix it?

Hello Alexander,

I am afraid that there is no a technical approach to achieve this layout without template column with UltrawebGrid. When you have template columns the grid is not aware what is the content of the columns and it does not know how to filter them. I have sample for you which utilize AJAX functionality of the grid and implements custom filtering with template headers.

Please download  and test it

Regards,

Rado,

Infragistics developer team

Infragistics