C# GridViewRow.DataBind方法代码示例

        private void InitializeRow(GridViewRow row, DataControlField[] fields, TableRowCollection newRows)
        {
            var e = new GridViewRowEventArgs(row);
            InitializeRow(row, fields);
            OnRowCreated(e);

            newRows.Add(row);

            row.DataBind();
            OnRowDataBound(e);
            row.DataItem = null;
        }

		protected override int CreateChildControls (IEnumerable data, bool dataBinding)
		{
			// clear GridView
			Controls.Clear ();
			table = null;
			rows = null;

			if (data == null) {
				return 0;
			}

			PagedDataSource dataSource;

			if (dataBinding) {
				DataSourceView view = GetData ();
				dataSource = new PagedDataSource ();
				dataSource.DataSource = data;
				
				if (AllowPaging) {
					dataSource.AllowPaging = true;
					dataSource.PageSize = PageSize;
					if (view.CanPage) {
						dataSource.AllowServerPaging = true;
						if (SelectArguments.RetrieveTotalRowCount)
							dataSource.VirtualCount = SelectArguments.TotalRowCount;
					}
					if (PageIndex >= dataSource.PageCount)
						pageIndex = dataSource.PageCount - 1;
					dataSource.CurrentPageIndex = PageIndex;
				}
				
				PageCount = dataSource.PageCount;
			}
			else
			{
				dataSource = new PagedDataSource ();
				dataSource.DataSource = data;
				if (AllowPaging) {
					dataSource.AllowPaging = true;
					dataSource.PageSize = PageSize;
					dataSource.CurrentPageIndex = PageIndex;
				}
			}

			bool createPager = AllowPaging && (PageCount >= 1) && PagerSettings.Visible;

			ArrayList list = new ArrayList ();
			
			// Creates the set of fields to show

			_dataEnumerator = null;
			ICollection fieldCollection = CreateColumns (dataSource, dataBinding);
			int fieldCount = fieldCollection.Count;
			DataControlField dcf;
			DataControlField[] fields = new DataControlField [fieldCount];
			fieldCollection.CopyTo (fields, 0);
			
			for (int i = 0; i < fieldCount; i++) {
				dcf = fields [i];
				dcf.Initialize (AllowSorting, this);
				if (EnableSortingAndPagingCallbacks)
					dcf.ValidateSupportsCallback ();
			}

			bool skip_first = false;
			IEnumerator enumerator;
			if (_dataEnumerator != null) {
				// replaced when creating bound columns
				enumerator = _dataEnumerator;
				skip_first = true;
			}
			else {
				enumerator = dataSource.GetEnumerator ();
			}

			// Main table creation
			while (skip_first || enumerator.MoveNext ()) {
				skip_first = false;
				object obj = enumerator.Current;
				
				if (list.Count == 0) {
					if (createPager && (PagerSettings.Position == PagerPosition.Top || PagerSettings.Position == PagerPosition.TopAndBottom)) {
						topPagerRow = CreatePagerRow (fieldCount, dataSource);
						OnRowCreated (new GridViewRowEventArgs (topPagerRow));
						ContainedTable.Rows.Add (topPagerRow);
						if (dataBinding) {
							topPagerRow.DataBind ();
							OnRowDataBound (new GridViewRowEventArgs (topPagerRow));
						}
						if (PageCount == 1)
							topPagerRow.Visible = false;
					}

					GridViewRow headerRow = CreateRow (-1, -1, DataControlRowType.Header, DataControlRowState.Normal);
					InitializeRow (headerRow, fields);
					OnRowCreated (new GridViewRowEventArgs (headerRow));
					ContainedTable.Rows.Add (headerRow);
					if (dataBinding) {
						headerRow.DataBind ();
						OnRowDataBound (new GridViewRowEventArgs (headerRow));
//.........这里部分代码省略.........

        protected override int CreateChildControls(IEnumerable dataSource, bool dataBinding)
        {
            int rows = base.CreateChildControls(dataSource, dataBinding);

            // no data rows created, create empty table if enabled
            if (rows == 0 && (ShowFooterWhenEmpty || ShowHeaderWhenEmpty))
            {
                // create the table
                Table table = CreateChildTable();

                Controls.Clear();
                Controls.Add(table);

                DataControlField[] fields;
                if (AutoGenerateColumns)
                {
                    var source = new PagedDataSource { DataSource = dataSource };

                    ICollection autoGeneratedColumns = CreateColumns(source, true);
                    fields = new DataControlField[autoGeneratedColumns.Count];
                    autoGeneratedColumns.CopyTo(fields, 0);
                }
                else
                {
                    fields = new DataControlField[Columns.Count];
                    Columns.CopyTo(fields, 0);
                }

                TableRowCollection newRows = table.Rows;
                if (ShowHeaderWhenEmpty)
                {
                    // create a new header row
                    _headerRow = CreateRow(-1, -1, DataControlRowType.Header, DataControlRowState.Normal);
                    InitializeRow(_headerRow, fields, newRows);
                }

                // create the empty row
                GridViewRow emptyRow = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
                TableCell cell = new TableCell();
                List<DataControlField> f = fields.Where(dataControlField => dataControlField.Visible).ToList();
                cell.ColumnSpan = f.Count;
                //cell.Width = Unit.Percentage(100);

                // respect the precedence order if both EmptyDataTemplate
                // and EmptyDataText are both supplied ...
                if (EmptyDataTemplate != null)
                {
                    EmptyDataTemplate.InstantiateIn(cell);
                }
                else if (!string.IsNullOrEmpty(EmptyDataText))
                {
                    cell.Controls.Add(new LiteralControl(EmptyDataText));
                }

                emptyRow.Cells.Add(cell);
                GridViewRowEventArgs e = new GridViewRowEventArgs(emptyRow);
                OnRowCreated(e);

                newRows.Add(emptyRow);

                emptyRow.DataBind();
                OnRowDataBound(e);
                emptyRow.DataItem = null;

                if (ShowFooterWhenEmpty && ShowFooter)
                {
                    // create footer row
                    _footerRow = CreateRow(-1, -1, DataControlRowType.Footer, DataControlRowState.Normal);
                    InitializeRow(_footerRow, fields, newRows);
                    newRows.Remove(emptyRow);
                }

            }

            return rows;
        }