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//------------------------------------------------------------------------------
// <copyright file="DataViewSettingCollection.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
// <owner current="false" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data {
using System;
using System.Diagnostics;
using System.ComponentModel;
using System.Collections;
[
Editor("Microsoft.VSDesigner.Data.Design.DataViewSettingsCollectionEditor, " + AssemblyRef.MicrosoftVSDesigner, "System.Drawing.Design.UITypeEditor, " + AssemblyRef.SystemDrawing),
]
public class DataViewSettingCollection : ICollection {
private readonly DataViewManager dataViewManager;
private readonly Hashtable list = new Hashtable();
internal DataViewSettingCollection(DataViewManager dataViewManager) {
if (dataViewManager == null) {
throw ExceptionBuilder.ArgumentNull("dataViewManager");
}
this.dataViewManager = dataViewManager;
}
public virtual DataViewSetting this[DataTable table] {
get {
if (table == null) {
throw ExceptionBuilder.ArgumentNull("table");
}
DataViewSetting dataViewSetting = (DataViewSetting) list[table];
if(dataViewSetting == null) {
dataViewSetting = new DataViewSetting();
this[table] = dataViewSetting;
}
return dataViewSetting;
}
set {
if (table == null) {
throw ExceptionBuilder.ArgumentNull("table");
}
value.SetDataViewManager(dataViewManager);
value.SetDataTable(table);
list[table] = value;
}
}
private DataTable GetTable(string tableName) {
DataTable dt = null;
DataSet ds = dataViewManager.DataSet;
if(ds != null) {
dt = ds.Tables[tableName];
}
return dt;
}
private DataTable GetTable(int index) {
DataTable dt = null;
DataSet ds = dataViewManager.DataSet;
if(ds != null) {
dt = ds.Tables[index];
}
return dt;
}
public virtual DataViewSetting this[string tableName] {
get {
DataTable dt = GetTable(tableName);
if(dt != null) {
return this[dt];
}
return null;
}
}
public virtual DataViewSetting this[int index] {
get {
DataTable dt = GetTable(index);
if(dt != null) {
return this[dt];
}
return null;
}
set {
DataTable dt = GetTable(index);
if(dt != null) {
this[dt] = value;
}else {
// throw excaption here.
}
}
}
// ----------- ICollection -------------------------
public void CopyTo(Array ar, int index) {
System.Collections.IEnumerator Enumerator = GetEnumerator();
while (Enumerator.MoveNext()) {
ar.SetValue(Enumerator.Current, index++);
}
}
public void CopyTo(DataViewSetting[] ar, int index) {
System.Collections.IEnumerator Enumerator = GetEnumerator();
while (Enumerator.MoveNext()) {
ar.SetValue(Enumerator.Current, index++);
}
}
[Browsable(false)]
public virtual int Count {
get {
DataSet ds = dataViewManager.DataSet;
return (ds == null) ? 0 : ds.Tables.Count;
}
}
public IEnumerator GetEnumerator() {
// I have to do something here.
return new DataViewSettingsEnumerator(dataViewManager);
}
[
Browsable(false)
]
public bool IsReadOnly {
get {
return true;
}
}
[Browsable(false)]
public bool IsSynchronized {
get {
// so the user will know that it has to lock this object
return false;
}
}
[Browsable(false)]
public object SyncRoot {
get {
return this;
}
}
internal void Remove(DataTable table) {
list.Remove(table);
}
private sealed class DataViewSettingsEnumerator : IEnumerator {
DataViewSettingCollection dataViewSettings;
IEnumerator tableEnumerator;
public DataViewSettingsEnumerator(DataViewManager dvm) {
DataSet ds = dvm.DataSet;
if(ds != null) {
dataViewSettings = dvm.DataViewSettings;
tableEnumerator = dvm.DataSet.Tables.GetEnumerator();
}else {
dataViewSettings = null;
tableEnumerator = DataSet.zeroTables.GetEnumerator();
}
}
public bool MoveNext() {
return tableEnumerator.MoveNext();
}
public void Reset() {
tableEnumerator.Reset();
}
public object Current {
get {
return dataViewSettings[(DataTable) tableEnumerator.Current];
}
}
}
}
}
|
