C # Datarow.itemarray Properties

Datarow.itemarray Property
Gets or sets all values for this row through an array.
Namespaces: System.Data

Assembly: System.Data (in system.data.dll)

code example:

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 ten 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]); }    }}

Abnormal:

Exception Type	conditions
ArgumentException	The array is larger than the number of columns in the table.
InvalidCastException	The values in the array do not match the DataType in their corresponding DataColumn.
ConstraintException	edit destroys the constraint.
Readonlyexception	The edit attempted to change the value of a read-only column.
NoNullAllowedException	The edit attempted to place a null value in a column with the AllowDBNull of false for the DataColumn object.
Deletedrowinaccessibleexception	The row has been deleted.

Datarow.itemarray Property Source code implementation:

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 ();d atacolumn[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 ();}}

The above is the content of C # Datarow.itemarray property, more relevant content please pay attention to topic.alibabacloud.com (www.php.cn)!

