[CLOSED] Custom grid with addtional columns

[Leonid_Veriga]

Hello.

I have created a class, which inherited from the GridPanel. In the javascript constructor of this grid, I populated default config of the grid. I want to create a AdditionalColumns property, which should works like ColumnModel. For that I right the following structure

public class MyGrid: GridPanel
{

                [Meta]
        [ConfigOption]
        [DefaultValue(0)]
        [NotifyParentProperty(true)]
        public override ConfigOptionsCollection ConfigOptions
        {
            get
            {

                // This check is need for dynamic control loading, using LoadControl
                //if (this.AdditionalColumns.Columns.Count > 0)
                //{
                    list.Add("additionalColumns", new ConfigOption("additionalColumns", new SerializationOptions("additionalColumns", typeof(LazyControlJsonConverter)), null, this.AdditionalColumns));
                //}
                return list;
            }
        }

        private GridHeaderContainer additionalColumns;


        [Meta]
        [ConfigOption("columns", typeof(LazyControlJsonConverter))]
        [PersistenceMode(PersistenceMode.InnerProperty)]
        [Description("Column definitions which define all columns that appear in this grid. Each column definition provides the header text for the column, and a definition of where the data for that column comes from.")]
        public virtual GridHeaderContainer AdditionalColumns
        {
            get
            {
                if (this.additionalColumns == null)
                {
                    this.additionalColumns = new GridHeaderContainer();
                    this.Controls.Add(this.additionalColumns);
                    this.LazyItems.Add(this.additionalColumns);
                }

                return this.additionalColumns;
            }
        }
}

This control is used in different cases:
a) Standard markup without additional columns
b) Standard markup with additional columns
c) a) + b) for case, when MyGrid is a part of the complex control, which is dynamically loaded using LoadControl method.

In variant mentioned above this control rises error in case c), because the following config is generated

{
     xtype: 'mygrid',
     additionalColumns:  /*there is no eny object here*/
}

I tried to add

if (this.AdditionalColumns.Columns.Count > 0)

check, which is commented above. Then case c) is going to work, but case a) failed with the error

"ItemTag validation (_tkn_134): Reference token (phContent_phToolsContent_ctl191_ClientInit) was not found."

Could you, please, suggest how can I fix my code to avoid errors for all cases?

Best regards.

[Vladimir]

Try this

        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            var addCm = this.AdditionalColumns; // to ensure that AdditionalColumns is created in time (not during serialization)
        }

[Leonid_Veriga]

This works for me. Thank you.