C#的DataRow.ItemArray属性详解

C#的DataRow.ItemArray属性详解2014-10-07DataRow.ItemArray 属性

通过一个数组来获取或设置此行的所有值。

命名空间:System.Data

程序集:System.Data（在 system.data.dll 中）

代码示例：

private void CreateRowsWithItemArray（）{// Make a DataTable using the function below.DataTable dt = MakeTableWithAutoIncrement（）;DataRow relation;// Declare the array variable.object [] rowArray = new object[2];// Create 10 new rows and add to DataRowCollection.for（int i = 0; i <10; i++）{rowArray[0]=null;rowArray[1]= "item " + i;relation = dt.NewRow（）;relation.ItemArray = rowArray;dt.Rows.Add（relation）;}PrintTable（dt）;}private DataTable MakeTableWithAutoIncrement（）{// Make a table with one AutoIncrement column.DataTable table = new DataTable（"table"）;DataColumn idColumn = new DataColumn（"id", Type.GetType（"System.Int32"））;idColumn.AutoIncrement = true;idColumn.AutoIncrementSeed = 10;table.Columns.Add（idColumn）; DataColumn firstNameColumn = new DataColumn（"Item", Type.GetType（"System.String"））;table.Columns.Add（firstNameColumn）;return table;}private void PrintTable（DataTable table）{foreach（DataRow row in table.Rows）{foreach（DataColumn column in table.Columns）{Console.WriteLine（row[column]）;}}}

异常：

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DataRow.ItemArray 属性源代码实现：

public object[] ItemArray{get{int defaultRecord = this.GetDefaultRecord（）;object[] array = new object[this._columns.Count];for （int i = 0; i < array.Length; i++）{DataColumn dataColumn = this._columns[i];array[i] = dataColumn[defaultRecord];}return array;}set{if （value == null）{throw ExceptionBuilder.ArgumentNull（"ItemArray"）;}if （this._columns.Count < value.Length）{throw ExceptionBuilder.ValueArrayLength（）;}DataColumnChangeEventArgs dataColumnChangeEventArgs = null;if （this._table.NeedColumnChangeEvents）{dataColumnChangeEventArgs = new DataColumnChangeEventArgs（this）;}bool flag = this.BeginEditInternal（）;for （int i = 0; i < value.Length; i++）{if （value[i] ！= null）{DataColumn dataColumn = this._columns[i];if （-1L ！= this.rowID && dataColumn.ReadOnly）{throw ExceptionBuilder.ReadOnly（dataColumn.ColumnName）;}if （dataColumnChangeEventArgs ！= null）{dataColumnChangeEventArgs.InitializeColumnChangeEvent（dataColumn, value[i]）;this._table.OnColumnChanging（dataColumnChangeEventArgs）;}if （dataColumn.Table ！= this._table）{throw ExceptionBuilder.ColumnNotInTheTable（dataColumn.ColumnName, this._table.TableName）;}if （-1L ！= this.rowID && dataColumn.ReadOnly）{throw ExceptionBuilder.ReadOnly（dataColumn.ColumnName）;}if （this.tempRecord == -1）{this.BeginEditInternal（）;}object obj = （dataColumnChangeEventArgs ！= null） ？ dataColumnChangeEventArgs.ProposedValue : value[i];if （obj == null）{if （dataColumn.IsValueType）{throw ExceptionBuilder.CannotSetToNull（dataColumn）;}obj = DBNull.Value;}try{int proposedRecordNo = this.GetProposedRecordNo（）;dataColumn[proposedRecordNo] = obj;}catch （Exception e）{if （ADP.IsCatchableOrSecurityExceptionType（e） && flag）{this.CancelEdit（）;}throw;}this.LastChangedColumn = dataColumn;if （dataColumnChangeEventArgs ！= null）{this._table.OnColumnChanged（dataColumnChangeEventArgs）;}}}this.EndEdit（）;}}