115 lines
3.0 KiB
C#
115 lines
3.0 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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namespace MonoTests.DataSource
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{
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public class DynamicDataSourceView<T> : DataSourceView
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{
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#region Private fields
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DynamicDataSource owner;
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IDynamicDataContainer<T> dataContainer;
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#endregion
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#region Can* overrides
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public override bool CanDelete
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{
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get { return true; }
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}
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public override bool CanInsert
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{
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get { return true; }
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}
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public override bool CanPage
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{
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get { return true; }
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}
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public override bool CanRetrieveTotalRowCount
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{
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get { return true; }
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}
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public override bool CanSort
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{
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get { return true; }
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}
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public override bool CanUpdate
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{
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get { return true; }
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}
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#endregion
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public IDynamicDataContainer<T> DataContainerInstance
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{
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get
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{
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if (dataContainer != null)
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return dataContainer;
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object inst = owner.DataContainerInstance;
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if (inst != null) {
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dataContainer = inst as IDynamicDataContainer<T>;
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if (dataContainer == null)
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throw new InvalidOperationException (
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"DynamicDataSource.DataContainerInstance must be set to an instance of '" + typeof (IDynamicDataContainer <T>) + "'.");
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if (String.IsNullOrEmpty (dataContainer.TableName))
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dataContainer.TableName = owner.EntitySetName;
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return dataContainer;
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}
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string typeName = owner.DataContainerTypeName;
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if (String.IsNullOrEmpty (typeName))
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throw new InvalidOperationException ("DynamicDataSource '" + owner.ID + "' does not specify either data container instance or its type name.");
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Type type = Type.GetType (typeName, true);
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if (!typeof (IDynamicDataContainer<T>).IsAssignableFrom (type))
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throw new InvalidOperationException ("Data container type '" + typeName + "' specified by DynamicDataSource '" + owner.ID + "' does not implement the IDynamicDataContainer interface.");
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dataContainer = Activator.CreateInstance (type, owner.EntitySetName) as IDynamicDataContainer<T>;
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if (dataContainer == null)
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throw new InvalidOperationException ("Failed to create instance of data container type '" + typeName + "'.");
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return dataContainer;
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}
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}
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#region Constructors
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public DynamicDataSourceView (DynamicDataSource owner, string viewName)
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: base (owner, viewName)
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{
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this.owner = owner;
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}
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#endregion
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#region DataSourceView methods
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protected override int ExecuteDelete (IDictionary keys, IDictionary oldValues)
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{
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return DataContainerInstance.Delete (keys, oldValues);
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}
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protected override int ExecuteInsert (IDictionary values)
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{
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return DataContainerInstance.Insert (values);
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}
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protected override int ExecuteUpdate (IDictionary keys, IDictionary values, IDictionary oldValues)
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{
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return DataContainerInstance.Update (keys, values, oldValues);
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}
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protected override IEnumerable ExecuteSelect (DataSourceSelectArguments arguments)
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{
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return DataContainerInstance.Select (arguments, owner.Where, owner.WhereParameters);
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}
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#endregion
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}
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}
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