如何向gridview添加时间戳

如何向gridview添加时间戳，以显示上次编辑行的时间？ 我一直在搜索谷歌，但还没有发现任何有用的东西。

我尝试创建一个方法来更新编辑或添加列的时间。 但我不知道怎么进一步把它解析成每一列。

我的表列

private DataTable GetDataTableFromDataGridview(DataGridView _grid) { { var _oDataTable = new DataTable(); object[] cellValues = new object[_grid.Columns.Count]; //clearTable(); _oDataTable.Columns.Add("Name", typeof(string)); _oDataTable.Columns.Add("Value", typeof(string)); _oDataTable.Columns.Add("Font", typeof(string)); _oDataTable.Columns.Add("DateStamp", typeof(string)); _oDataTable.Columns.Add("Comment", typeof(string)); foreach (DataGridViewRow row in _grid.Rows) { for (int i = 0; i < row.Cells.Count; i++) { cellValues[i] = row.Cells[i].Value; } _oDataTable.Rows.Add(cellValues.ToArray()); } return _oDataTable; } } 

我的方法

  private DateTime _dateTime; string _DateTimeFormat = "yyyy/dd/MM HH:mm:ss"; public void UpdateTheCurrentTime() { _dateTime = DateTime.Now; _dateTime.ToString(_DateTimeFormat, CultureInfo.InvariantCulture); } 

Answer 1

我想你可以在数据库方面处理这个问题。 由于它是一个数据绑定网格视图，因此您只需要一个默认值为NOW()的日期时间字段，用于MySql。 对于SQL Server，我相信使用datetime.now()的持久计算列会这样做。

Answer 2

DataGridView.CellValueChanged事件：
https://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.cellvaluechanged%28v=vs.110%29.aspx

 private void MyDataGridView_CellValueChanged(object sender, DataGridViewCellEventArgs e) { DataGridViewRow changedRow = myDataGridView.Rows[e.RowIndex]; } 

Answer 3

更新数据表中记录的最简单方法是使用BeginEdit

 private void DemonstrateRowBeginEdit() { DataTable table = new DataTable("table1"); DataColumn column = new DataColumn("col1",Type.GetType("System.Int32")); table.RowChanged+=new DataRowChangeEventHandler(Row_Changed); table.Columns.Add(column); // Add a UniqueConstraint to the table. table.Constraints.Add(new UniqueConstraint(column)); // Add five rows. DataRow newRow; for(int i = 0;i<5; i++) { // RowChanged event will occur for every addition. newRow= table.NewRow(); newRow[0]= i; table.Rows.Add(newRow); } // AcceptChanges. table.AcceptChanges(); // Invoke BeginEdit on each. Console.WriteLine( "\n Begin Edit and print original and proposed values \n"); foreach(DataRow row in table.Rows) { row.BeginEdit(); row[0]=(int) row[0]+10; Console.Write("\table Original \table" + row[0, DataRowVersion.Original]); Console.Write("\table Proposed \table" + row[0,DataRowVersion.Proposed] + "\n"); } Console.WriteLine("\n"); // Accept changes table.AcceptChanges(); // Change two rows to identical values after invoking BeginEdit. table.Rows[0].BeginEdit(); table.Rows[1].BeginEdit(); table.Rows[0][0]= 100; table.Rows[1][0]=100; try { /* Now invoke EndEdit. This will cause the UniqueConstraint to be enforced.*/ table.Rows[0].EndEdit(); table.Rows[1].EndEdit(); } catch(Exception e) { // Process exception and return. Console.WriteLine("Exception of type {0} occurred.", e.GetType()); } } private void Row_Changed(object sender, System.Data.DataRowChangeEventArgs e) { DataTable table = (DataTable) sender; Console.WriteLine("RowChanged " + e.Action.ToString() + "\table" + e.Row.ItemArray[0]); }