Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWebControlsDesign / System / Data / WebControls / Design / EntityDataSourceStatementEditor.cs / 1305376 / EntityDataSourceStatementEditor.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.ComponentModel; using System.ComponentModel.Design; using System.Web.UI.Design.WebControls.Util; using System.Diagnostics; using System.Drawing.Design; using System.Web.UI; using System.Web.UI.Design; using System.Web.UI.WebControls; using System.Windows.Forms; namespace System.Web.UI.Design.WebControls { internal class EntityDataSourceStatementEditor : UITypeEditor { private bool EditQueryChangeCallback(object pair) { // pair.First is a wrapper that contains the EntityDataSource instance and property name being edited // pair.Second contains the value of the property being edited ITypeDescriptorContext context = (ITypeDescriptorContext)((Pair)pair).First; string value = (string)((Pair)pair).Second; EntityDataSource entityDataSource = (EntityDataSource)context.Instance; IServiceProvider serviceProvider = entityDataSource.Site; IDesignerHost designerHost = (IDesignerHost)serviceProvider.GetService(typeof(IDesignerHost)); Debug.Assert(designerHost != null, "Did not get DesignerHost service."); EntityDataSourceDesigner designer = (EntityDataSourceDesigner)designerHost.GetDesigner(entityDataSource); // Configure the dialog for the specified property and display it return Initialize(designer, entityDataSource, context.PropertyDescriptor.Name, serviceProvider, value); } public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) { ControlDesigner.InvokeTransactedChange( (IComponent)context.Instance, new TransactedChangeCallback(EditQueryChangeCallback), new Pair(context, value), Strings.ExpressionEditorTransactionDescription); return value; } // Determines if the specified property is one that has an associated "AutoGenerateXXXClause" property private static bool GetAutoGen(string operation, EntityDataSourceDesigner entityDataSourceDesigner) { if (String.Equals("Where", operation, StringComparison.Ordinal)) { return entityDataSourceDesigner.AutoGenerateWhereClause; } else if (String.Equals("OrderBy", operation, StringComparison.Ordinal)) { return entityDataSourceDesigner.AutoGenerateOrderByClause; } return false; } public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) { return UITypeEditorEditStyle.Modal; } // Gets the name of the AutoGenerateXXXProperty associated with the specified property name private static string GetOperationAutoGenerateProperty(string propertyName) { if (String.Equals("Where", propertyName, StringComparison.Ordinal)) { return "AutoGenerateWhereClause"; } else if (String.Equals("OrderBy", propertyName, StringComparison.Ordinal)) { return "AutoGenerateOrderByClause"; } return null; } // Gets the label text or accessible name to display over the textbox for editing the specified property name private static string GetStatementLabel(string propertyName, bool accessible) { switch (propertyName) { case "CommandText": return accessible ? Strings.ExpressionEditor_CommandTextLabelAccessibleName : Strings.ExpressionEditor_CommandTextLabel; case "OrderBy": case "Select": case "Where": return accessible ? Strings.ExpressionEditor_ExpressionStatementLabelAccessibleName(propertyName) : Strings.ExpressionEditor_ExpressionStatementLabel(propertyName); default: Debug.Fail("Unknown property name in EntityDataSourceStatementEditor: " + propertyName); return null; } } // Gets the F1 help topic for each of the dialogs using the specified property name private static string GetHelpTopic(string propertyName) { switch (propertyName) { case "CommandText": return "net.Asp.EntityDataSource.CommandTextExpression"; case "OrderBy": return "net.Asp.EntityDataSource.OrderByExpression"; case "Select": return "net.Asp.EntityDataSource.SelectExpression"; case "Where": return "net.Asp.EntityDataSource.WhereExpression"; default: Debug.Fail("Unknown property name in EntityDataSourceStatementEditor: " + propertyName); return String.Empty; } } // Gets the property name for the parameters property associated with the specified property name private static string GetOperationParameterProperty(string propertyName) { switch (propertyName) { case "CommandText": return "CommandParameters"; case "OrderBy": return "OrderByParameters"; case "Select": return "SelectParameters"; case "Where": return "WhereParameters"; default: Debug.Fail("Unknown property name in EntityDataSourceStatementEditor: " + propertyName); return null; } } // Gets a clone of the parameters collection associated with the specified property name private static ParameterCollection GetParameters(string propertyName, EntityDataSourceDesigner designer) { switch (propertyName) { case "CommandText": return designer.CloneCommandParameters(); case "OrderBy": return designer.CloneOrderByParameters(); case "Select": return designer.CloneSelectParameters(); case "Where": return designer.CloneWhereParameters(); default: Debug.Fail("Unknown property name in EntityDataSourceStatementEditor: " + propertyName); return null; } } // Updates the parameters collection associated with the specified property name private static void SetParameters(string propertyName, EntityDataSourceDesigner designer, ParameterCollection parameters) { switch (propertyName) { case "CommandText": designer.SetCommandParameterContents(parameters); break; case "OrderBy": designer.SetOrderByParameterContents(parameters); break; case "Select": designer.SetSelectParameterContents(parameters); break; case "Where": designer.SetWhereParameterContents(parameters); break; default: Debug.Fail("Unknown property name in EntityDataSourceStatementEditor: " + propertyName); break; } } // Configures and displays the editor dialog based on the specified property name private bool Initialize(EntityDataSourceDesigner designer, EntityDataSource entityDataSource, string propertyName, IServiceProvider serviceProvider, string statement) { string propertyParameters = GetOperationParameterProperty(propertyName); string autoGenProperty = GetOperationAutoGenerateProperty(propertyName); bool hasAutoGen = (autoGenProperty != null); bool autoGen = GetAutoGen(propertyName, designer); ParameterCollection parameters = GetParameters(propertyName, designer); string label = GetStatementLabel(propertyName, false); string accessibleName = GetStatementLabel(propertyName, true); string helpTopic = GetHelpTopic(propertyName); EntityDataSourceStatementEditorForm form = new EntityDataSourceStatementEditorForm(entityDataSource, serviceProvider, hasAutoGen, autoGen, propertyName, label, accessibleName, helpTopic, statement, parameters); DialogResult result = UIHelper.ShowDialog(serviceProvider, form); if (result == DialogResult.OK) { // We use the property descriptors to reset the values to // make sure we clear out any databindings or expressions that // may be set. PropertyDescriptor propDesc = null; if (autoGenProperty != null) { propDesc = TypeDescriptor.GetProperties(entityDataSource)[autoGenProperty]; propDesc.ResetValue(entityDataSource); propDesc.SetValue(entityDataSource, form.AutoGen); } if (propertyName != null) { propDesc = TypeDescriptor.GetProperties(entityDataSource)[propertyName]; propDesc.ResetValue(entityDataSource); propDesc.SetValue(entityDataSource, form.Statement); } if (propertyParameters != null) { SetParameters(propertyName, designer, form.Parameters); } return true; } else { return false; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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