/// <devdoc>
/// <para>
/// Gets the <see cref='System.Data.DataColumn'/>
/// from the collection at the specified index.
/// </para>
/// </devdoc>
public DataColumn this[int index] {
get {
try { // Perf: use the readonly _list field directly and let ArrayList check the range
return((DataColumn)_list[index]);
}
catch (ArgumentOutOfRangeException) {
throw ExceptionBuilder.ColumnOutOfRange(index);
}
}
}
/// <summary>
/// Removes the column at the specified index from the collection.
/// </summary>
public void RemoveAt(int index)
{
DataColumn dc = this[index];
if (dc == null)
{
throw ExceptionBuilder.ColumnOutOfRange(index);
}
Remove(dc);
}
public void RemoveAt(int index)
{
DataColumn column = this[index];
if (column == null)
{
throw ExceptionBuilder.ColumnOutOfRange(index);
}
this.Remove(column);
}
public void SetColumnError(int columnIndex, string error)
{
DataColumn column = this._columns[columnIndex];
if (column == null)
{
throw ExceptionBuilder.ColumnOutOfRange(columnIndex);
}
this.SetColumnError(column, error);
}
/// <include file='doc\DataRow.uex' path='docs/doc[@for="DataRow.GetColumnError"]/*' />
/// <devdoc>
/// <para>Gets the error description for the column specified
/// by index.</para>
/// </devdoc>
public string GetColumnError(int columnIndex)
{
DataColumn column = Table.Columns[columnIndex];
if (column == null)
{
throw ExceptionBuilder.ColumnOutOfRange(columnIndex);
}
return(GetColumnError(column));
}
// TODO: waiting for COM+ internal fix.
/// <include file='doc\DataRow.uex' path='docs/doc[@for="DataRow.IsNull"]/*' />
/// <devdoc>
/// <para>
/// Gets
/// a value indicating whether the column at the specified index contains a
/// null value.
/// </para>
/// </devdoc>
public bool IsNull(int columnIndex)
{
DataColumn column = Table.Columns[columnIndex];
if (column == null)
{
throw ExceptionBuilder.ColumnOutOfRange(columnIndex);
}
return(IsNull(column));
}
/// <include file='doc\DataColumnCollection.uex' path='docs/doc[@for="DataColumnCollection.this"]/*' />
/// <devdoc>
/// <para>
/// Gets the <see cref='System.Data.DataColumn'/>
/// from the collection at the specified index.
/// </para>
/// </devdoc>
public virtual DataColumn this[int index] {
get {
// PROFILE: leave the lists as variable access because they generate lots of calls
// in profiler.
if (index >= 0 && index < list.Count)
{
return((DataColumn)list[index]);
}
throw ExceptionBuilder.ColumnOutOfRange(index);
}
}
public DataColumn this[int index]
{
get
{
DataColumn column;
try
{
column = (DataColumn)this._list[index];
}
catch (ArgumentOutOfRangeException)
{
throw ExceptionBuilder.ColumnOutOfRange(index);
}
return(column);
}
}
/// <include file='doc\DataRowView.uex' path='docs/doc[@for="DataRowView.this"]/*' />
/// <devdoc>
/// <para>
/// Gets or sets a value in a specified column.
/// </para>
/// </devdoc>
public object this[int ndx] {
get {
if (!(0 <= ndx && ndx < dataView.Table.Columns.Count))
{
throw ExceptionBuilder.ColumnOutOfRange(ndx);
}
return(row[ndx, dataView.IsOriginalVersion(this.index) ? DataRowVersion.Original : DataRowVersion.Default]);
}
set {
if (!(0 <= ndx && ndx < dataView.Table.Columns.Count))
{
throw ExceptionBuilder.ColumnOutOfRange(ndx);
}
if (!dataView.AllowEdit && (row != dataView.addNewRow))
{
throw ExceptionBuilder.CanNotEdit();
}
SetColumnValue(dataView.Table.Columns[ndx], value);
}
}
