Ce post va sans doute poser une question ridicule mais je suis un débutant en objet et en .net donc je supplie l'assistance de bien vouloir être indulgente :o

Je tente de faire une appli tout con avec une Fenêtre (Form1) et une classe abstract (Feed) donc héritent 3 classes: MusicFeed, TalkFeed et VideoFeed.

Depuis une méthode de MusicFeed (et des autres par la suite) je voudrais modifier le contenu Text de certains controles, en l'espèce, des System.Windows.Forms.TextBox et des System.Windows.Forms.ComboBox.
Problème: par défaut ces contrôles étaient des membres private de Form1 j'ai donc modifié la propriété Modifiers en public (internal devrait suffire mais bon).

Dans le Form1.Designer.cs, on trouve désormais:

Code : Sélectionner tout - Visualiser dans une fenêtre à part
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
 
 
 
namespace Podcast1
{
    partial class Form1
    {
        /// <summary>
        /// Variable nécessaire au concepteur.
        /// </summary>
        private System.ComponentModel.IContainer components = null;
 
        /// <summary>
        /// Nettoyage des ressources utilisées.
        /// </summary>
        /// <param name="disposing">true si les ressources managées doivent être supprimées ; sinon, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }
 
        #region Code généré par le Concepteur Windows Form
 
        /// <summary>
        /// Méthode requise pour la prise en charge du concepteur - ne modifiez pas
        /// le contenu de cette méthode avec l'éditeur de code.
        /// </summary>
        private void InitializeComponent()
        {
            this.listeFlux = new System.Windows.Forms.ListBox();
            this.inputUrl = new System.Windows.Forms.TextBox();
            this.btnAdd = new System.Windows.Forms.Button();
            this.btnDel = new System.Windows.Forms.Button();
            this.btnSave = new System.Windows.Forms.Button();
            this.grpList = new System.Windows.Forms.GroupBox();
            this.grpPodcast = new System.Windows.Forms.GroupBox();
            this.inputGenre = new System.Windows.Forms.ComboBox();
            this.label4 = new System.Windows.Forms.Label();
            this.inputType = new System.Windows.Forms.ComboBox();
            this.label3 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.label1 = new System.Windows.Forms.Label();
            this.inputName = new System.Windows.Forms.TextBox();
            this.grpList.SuspendLayout();
            this.grpPodcast.SuspendLayout();
            this.SuspendLayout();
            // 
            // listeFlux
            // 
            this.listeFlux.FormattingEnabled = true;
            this.listeFlux.Location = new System.Drawing.Point(7, 20);
            this.listeFlux.Name = "listeFlux";
            this.listeFlux.Size = new System.Drawing.Size(598, 264);
            this.listeFlux.Sorted = true;
            this.listeFlux.TabIndex = 0;
            this.listeFlux.SelectedValueChanged += new System.EventHandler(this.listeFlux_SelectedValueChanged);
            // 
            // inputUrl
            // 
            this.inputUrl.Location = new System.Drawing.Point(42, 20);
            this.inputUrl.Name = "inputUrl";
            this.inputUrl.Size = new System.Drawing.Size(567, 21);
            this.inputUrl.TabIndex = 1;
            // 
            // btnAdd
            // 
            this.btnAdd.Location = new System.Drawing.Point(615, 19);
            this.btnAdd.Name = "btnAdd";
            this.btnAdd.Size = new System.Drawing.Size(59, 21);
            this.btnAdd.TabIndex = 2;
            this.btnAdd.Text = "&Add";
            this.btnAdd.UseVisualStyleBackColor = true;
            this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
            // 
            // btnDel
            // 
            this.btnDel.Location = new System.Drawing.Point(615, 46);
            this.btnDel.Name = "btnDel";
            this.btnDel.Size = new System.Drawing.Size(59, 21);
            this.btnDel.TabIndex = 3;
            this.btnDel.Text = "&Delete";
            this.btnDel.UseVisualStyleBackColor = true;
            this.btnDel.Click += new System.EventHandler(this.btnDel_Click);
            // 
            // btnSave
            // 
            this.btnSave.Location = new System.Drawing.Point(611, 20);
            this.btnSave.Name = "btnSave";
            this.btnSave.Size = new System.Drawing.Size(59, 21);
            this.btnSave.TabIndex = 4;
            this.btnSave.Text = "&Save";
            this.btnSave.UseVisualStyleBackColor = true;
            this.btnSave.Click += new System.EventHandler(this.btnSave_Click);
            // 
            // grpList
            // 
            this.grpList.Controls.Add(this.btnSave);
            this.grpList.Controls.Add(this.listeFlux);
            this.grpList.Location = new System.Drawing.Point(5, 5);
            this.grpList.Name = "grpList";
            this.grpList.Size = new System.Drawing.Size(677, 288);
            this.grpList.TabIndex = 5;
            this.grpList.TabStop = false;
            this.grpList.Text = "List";
            // 
            // grpPodcast
            // 
            this.grpPodcast.Controls.Add(this.inputGenre);
            this.grpPodcast.Controls.Add(this.label4);
            this.grpPodcast.Controls.Add(this.inputType);
            this.grpPodcast.Controls.Add(this.label3);
            this.grpPodcast.Controls.Add(this.label2);
            this.grpPodcast.Controls.Add(this.label1);
            this.grpPodcast.Controls.Add(this.inputName);
            this.grpPodcast.Controls.Add(this.inputUrl);
            this.grpPodcast.Controls.Add(this.btnDel);
            this.grpPodcast.Controls.Add(this.btnAdd);
            this.grpPodcast.Location = new System.Drawing.Point(5, 299);
            this.grpPodcast.Name = "grpPodcast";
            this.grpPodcast.Size = new System.Drawing.Size(676, 113);
            this.grpPodcast.TabIndex = 6;
            this.grpPodcast.TabStop = false;
            this.grpPodcast.Text = "Podcast";
            // 
            // inputGenre
            // 
            this.inputGenre.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.inputGenre.FormattingEnabled = true;
            this.inputGenre.Items.AddRange(new object[] {
            "(N/A)",
            "Bues",
            "Country",
            "Disco",
            "Dance",
            "Funk",
            "Hip Hop",
            "Jazz",
            "Pop",
            "R&B",
            "Reggae",
            "Rock",
            "Techno"});
            this.inputGenre.Location = new System.Drawing.Point(53, 74);
            this.inputGenre.MaxDropDownItems = 13;
            this.inputGenre.Name = "inputGenre";
            this.inputGenre.Size = new System.Drawing.Size(96, 21);
            this.inputGenre.TabIndex = 9;
            // 
            // label4
            // 
            this.label4.AutoSize = true;
            this.label4.Location = new System.Drawing.Point(7, 77);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(40, 13);
            this.label4.TabIndex = 8;
            this.label4.Text = "Genre:";
            // 
            // inputType
            // 
            this.inputType.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.inputType.FormattingEnabled = true;
            this.inputType.Items.AddRange(new object[] {
            "Music",
            "Talk",
            "Video"});
            this.inputType.Location = new System.Drawing.Point(510, 47);
            this.inputType.MaxDropDownItems = 3;
            this.inputType.Name = "inputType";
            this.inputType.Size = new System.Drawing.Size(99, 21);
            this.inputType.TabIndex = 7;
            this.inputType.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.inputType_TextChanged);
            this.inputType.TextChanged += new System.EventHandler(this.inputType_TextChanged);
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(469, 50);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(35, 13);
            this.label3.TabIndex = 6;
            this.label3.Text = "Type:";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(7, 50);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(38, 13);
            this.label2.TabIndex = 5;
            this.label2.Text = "Name:";
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(6, 24);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(30, 13);
            this.label1.TabIndex = 4;
            this.label1.Text = "URL:";
            // 
            // inputName
            // 
            this.inputName.Location = new System.Drawing.Point(50, 47);
            this.inputName.Name = "inputName";
            this.inputName.Size = new System.Drawing.Size(413, 21);
            this.inputName.TabIndex = 1;
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.AutoSize = true;
            this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
            this.ClientSize = new System.Drawing.Size(685, 418);
            this.Controls.Add(this.grpPodcast);
            this.Controls.Add(this.grpList);
            this.MaximizeBox = false;
            this.Name = "Form1";
            this.Text = "Podcast Project";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.grpList.ResumeLayout(false);
            this.grpPodcast.ResumeLayout(false);
            this.grpPodcast.PerformLayout();
            this.ResumeLayout(false);
 
        }
 
        #endregion
 
        private System.Windows.Forms.ListBox listeFlux;
        private System.Windows.Forms.Button btnAdd;
        private System.Windows.Forms.Button btnDel;
        private System.Windows.Forms.Button btnSave;
        private System.Windows.Forms.GroupBox grpList;
        private System.Windows.Forms.GroupBox grpPodcast;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        public System.Windows.Forms.TextBox inputUrl;
        public System.Windows.Forms.ComboBox inputType;
        public System.Windows.Forms.TextBox inputName;
        public System.Windows.Forms.ComboBox inputGenre;
    }
}
Les quatre dernières lignes sont a priori OK.

Dans Form1.cs, j'ai tapé:


Code : Sélectionner tout - Visualiser dans une fenêtre à part
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
 
 
 
    /// <summary>
    ///  Basic class for any kind of feed
    /// </summary>
    public abstract class Feed
    {
        protected string url;
        protected string name;
 
        public string Name
        {
            get
            {
                return name;
            }
 
            set
            {
                name = value;
            }
        }
        public string Url
        {
            get
            {
                return url;
            }
 
            set
            {
                url = value;
            }
        }
        public abstract void Load();
    }
 
    public class MusicFeed : Feed
    {
        string genre;
 
        public string Genre
        {
            get
            {
                return genre;
            }
 
            set
            {
                genre = value;
            }
        }
 
        public MusicFeed(string inName, string inUrl, string inGenre)
        {
            name = inName;
            url = inUrl;
            genre = inGenre;
        }
 
        public override void Load()
        {
            Form1.inputName.Text = name;
        }
 
    }
Sauf que non, il semble que VS ne voit pas de memebre inputName à Form1: Intellisense ne le propose pas et le compilateur génère une erreur "Erreur 2 Une référence d'objet est requise pour la propriété, la méthode ou le champ non statique 'Podcast1.Form1.inputName' " (Podcast1 est le namespace qui contient tout).

Quelqu'un ici aurait une piste ?