protected DevExpress.Web.ASPxEditors.FilterControlColumnType get_column_type(String coltype)
    {
        DevExpress.Web.ASPxEditors.FilterControlColumnType _columntype = new DevExpress.Web.ASPxEditors.FilterControlColumnType();

        switch (coltype)
        {
            case "boolean":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Boolean;
                break;
            case "datetime":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.DateTime;
                break;
            case "decimal":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Decimal;
                break;
            case "default":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Default;
                break;
            case "double":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Double;
                break;
            case "integer":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Integer;
                break;
            case "string":
                _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.String;
                break;
        }
        return _columntype;
    }
    //end bind session data
    protected DevExpress.Web.ASPxEditors.FilterControlColumnType get_column_type(String coltype)
    {
        DevExpress.Web.ASPxEditors.FilterControlColumnType _columntype = new DevExpress.Web.ASPxEditors.FilterControlColumnType();

        switch (coltype)
        {
        case "boolean":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Boolean;
            break;

        case "datetime":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.DateTime;
            break;

        case "decimal":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Decimal;
            break;

        case "default":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Default;
            break;

        case "double":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Double;
            break;

        case "integer":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.Integer;
            break;

        case "string":
            _columntype = DevExpress.Web.ASPxEditors.FilterControlColumnType.String;
            break;
        }
        return(_columntype);
    }