mcs/class/Npgsql/Npgsql/Design/ConnectionStringEditor.cs

   1 using System;
   2 using System.Drawing.Design;
   3 using System.ComponentModel;
   4 using System.Windows.Forms;
   5 using System.Windows.Forms.Design;
   6
   7 namespace Npgsql.Design
   8 {
   9         /// <summary>
  10         /// An UITypeEditor that simply initializes a
  11         /// ConnectionStringEditorForm if possible
  12         /// </summary>
  13         internal class ConnectionStringEditor : UITypeEditor
  14         {
  15                 /// <summary>
  16                 /// Edits the Value of the given Object using the EditSyle given by GetEditStyle.
  17                 /// </summary>
  18                 /// <param name="context">An ITypeDescriptorContext, through wich you can get additional context information.</param>
  19                 /// <param name="provider">An IServiceProvider, through which this editor may order services.</param>
  20                 /// <param name="value">The Object to edit</param>
  21                 /// <returns>The new value of the Object</returns>
  22                 public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
  23                 {
  24                         if (context != null && context.Instance != null && provider != null) {
  25                                 IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
  26
  27                                 if (edSvc != null) {
  28                                         ConnectionStringEditorForm eform;
  29
  30                                         if(value != null && value.ToString() != String.Empty) {
  31                                                 eform = new ConnectionStringEditorForm(value.ToString());
  32                                         } else {
  33                                                 eform = new ConnectionStringEditorForm();
  34                                         }
  35
  36                                         if(edSvc.ShowDialog(eform) == DialogResult.OK) {
  37                                                 return eform.ConnectionString;
  38                                         } else {
  39                                                 return value;
  40                                         }
  41                                 } else {
  42                                         return value;
  43                                 }
  44                         }
  45
  46                         return value;
  47                 }
  48
  49                 /// <summary>
  50                 /// Requests the EditSyle to be used by EditValue
  51                 /// </summary>
  52                 /// <param name="context">An ITypeDescriptorContext, through wich you can get additional context information.</param>
  53                 /// <returns>An UITypeEditorEditStyle-Value, indicating the EditStyle used by EditValue. If UITypeEditor doesn't support this method, GetEditStyle returns the value None.</returns>
  54                 public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
  55                 {
  56                         if (context != null && context.Instance != null) {
  57                                 return UITypeEditorEditStyle.Modal;
  58                         }
  59
  60                         return base.GetEditStyle (context);
  61                 }
  62         }
  63 }
  64