dscategories.cs

C#150例

                    return ((CategoriesRow)(this.Rows[index]));
                }
            }
            
            public event CategoriesRowChangeEventHandler CategoriesRowChanged;
            
            public event CategoriesRowChangeEventHandler CategoriesRowChanging;
            
            public event CategoriesRowChangeEventHandler CategoriesRowDeleted;
            
            public event CategoriesRowChangeEventHandler CategoriesRowDeleting;
            
            public void AddCategoriesRow(CategoriesRow row) {
                this.Rows.Add(row);
            }
            
            public CategoriesRow AddCategoriesRow(string CategoryName, string Description) {
                CategoriesRow rowCategoriesRow = ((CategoriesRow)(this.NewRow()));
                rowCategoriesRow.ItemArray = new object[] {
                        null,
                        CategoryName,
                        Description};
                this.Rows.Add(rowCategoriesRow);
                return rowCategoriesRow;
            }
            
            public CategoriesRow FindByCategoryID(int CategoryID) {
                return ((CategoriesRow)(this.Rows.Find(new object[] {
                            CategoryID})));
            }
            
            public System.Collections.IEnumerator GetEnumerator() {
                return this.Rows.GetEnumerator();
            }
            
            public override DataTable Clone() {
                CategoriesDataTable cln = ((CategoriesDataTable)(base.Clone()));
                cln.InitVars();
                return cln;
            }
            
            protected override DataTable CreateInstance() {
                return new CategoriesDataTable();
            }
            
            internal void InitVars() {
                this.columnCategoryID = this.Columns["CategoryID"];
                this.columnCategoryName = this.Columns["CategoryName"];
                this.columnDescription = this.Columns["Description"];
            }
            
            private void InitClass() {
                this.columnCategoryID = new DataColumn("CategoryID", typeof(int), null, System.Data.MappingType.Element);
                this.Columns.Add(this.columnCategoryID);
                this.columnCategoryName = new DataColumn("CategoryName", typeof(string), null, System.Data.MappingType.Element);
                this.Columns.Add(this.columnCategoryName);
                this.columnDescription = new DataColumn("Description", typeof(string), null, System.Data.MappingType.Element);
                this.Columns.Add(this.columnDescription);
                this.Constraints.Add(new UniqueConstraint("Constraint1", new DataColumn[] {
                                this.columnCategoryID}, true));
                this.columnCategoryID.AutoIncrement = true;
                this.columnCategoryID.AllowDBNull = false;
                this.columnCategoryID.ReadOnly = true;
                this.columnCategoryID.Unique = true;
                this.columnCategoryName.AllowDBNull = false;
            }
            
            public CategoriesRow NewCategoriesRow() {
                return ((CategoriesRow)(this.NewRow()));
            }
            
            protected override DataRow NewRowFromBuilder(DataRowBuilder builder) {
                return new CategoriesRow(builder);
            }
            
            protected override System.Type GetRowType() {
                return typeof(CategoriesRow);
            }
            
            protected override void OnRowChanged(DataRowChangeEventArgs e) {
                base.OnRowChanged(e);
                if ((this.CategoriesRowChanged != null)) {
                    this.CategoriesRowChanged(this, new CategoriesRowChangeEvent(((CategoriesRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowChanging(DataRowChangeEventArgs e) {
                base.OnRowChanging(e);
                if ((this.CategoriesRowChanging != null)) {
                    this.CategoriesRowChanging(this, new CategoriesRowChangeEvent(((CategoriesRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowDeleted(DataRowChangeEventArgs e) {
                base.OnRowDeleted(e);
                if ((this.CategoriesRowDeleted != null)) {
                    this.CategoriesRowDeleted(this, new CategoriesRowChangeEvent(((CategoriesRow)(e.Row)), e.Action));
                }
            }
            
            protected override void OnRowDeleting(DataRowChangeEventArgs e) {
                base.OnRowDeleting(e);
                if ((this.CategoriesRowDeleting != null)) {
                    this.CategoriesRowDeleting(this, new CategoriesRowChangeEvent(((CategoriesRow)(e.Row)), e.Action));
                }
            }
            
            public void RemoveCategoriesRow(CategoriesRow row) {
                this.Rows.Remove(row);
            }
        }
        
        [System.Diagnostics.DebuggerStepThrough()]
        public class CategoriesRow : DataRow {
            
            private CategoriesDataTable tableCategories;
            
            internal CategoriesRow(DataRowBuilder rb) : 
                    base(rb) {
                this.tableCategories = ((CategoriesDataTable)(this.Table));
            }
            
            public int CategoryID {
                get {
                    return ((int)(this[this.tableCategories.CategoryIDColumn]));
                }
                set {
                    this[this.tableCategories.CategoryIDColumn] = value;
                }
            }
            
            public string CategoryName {
                get {
                    return ((string)(this[this.tableCategories.CategoryNameColumn]));
                }
                set {
                    this[this.tableCategories.CategoryNameColumn] = value;
                }
            }
            
            public string Description {
                get {
                    try {
                        return ((string)(this[this.tableCategories.DescriptionColumn]));
                    }
                    catch (InvalidCastException e) {
                        throw new StrongTypingException("无法获取值，因为它是 DBNull。", e);
                    }
                }
                set {
                    this[this.tableCategories.DescriptionColumn] = value;
                }
            }
            
            public bool IsDescriptionNull() {
                return this.IsNull(this.tableCategories.DescriptionColumn);
            }
            
            public void SetDescriptionNull() {
                this[this.tableCategories.DescriptionColumn] = System.Convert.DBNull;
            }
        }
        
        [System.Diagnostics.DebuggerStepThrough()]
        public class CategoriesRowChangeEvent : EventArgs {
            
            private CategoriesRow eventRow;
            
            private DataRowAction eventAction;
            
            public CategoriesRowChangeEvent(CategoriesRow row, DataRowAction action) {
                this.eventRow = row;
                this.eventAction = action;
            }
            
            public CategoriesRow Row {
                get {
                    return this.eventRow;
                }
            }
            
            public DataRowAction Action {
                get {
                    return this.eventAction;
                }
            }
        }
    }
}