add rudimentary ListView control

src/lib/MBS.Web/UI/HtmlControls/HtmlGenericControl.cs

@@ -2,8 +2,9 @@ namespace MBS.Web.UI.HtmlControls;
 
 using System.Xml;
 using MBS.Core.Collections.Generic;
+using MBS.Web.UI.WebControls;
 
-public class HtmlGenericControl : Control
+public class HtmlGenericControl : Container
 {
 	private string _tagName;
 	protected override string TagName => _tagName;
@@ -36,10 +37,16 @@ public class HtmlGenericControl : Control
 
     protected override void RenderContents(XmlWriter writer)
     {
-        base.RenderContents(writer);
-		if (Content != null)
+		if (GetChildControls().Count == 0)
 		{
-			writer.WriteRaw(Content);
+			if (Content != null)
+			{
+				writer.WriteRaw(Content);
+			}
+		}
+		else
+		{
+        	base.RenderContents(writer);
 		}
     }
 

src/lib/MBS.Web/UI/WebControls/Button.cs

@@ -16,7 +16,7 @@ public class Button : WebControlWithMnemonic
 		// if (!UseSubmitBehavior)
 		{
 			WriteTextWithMnemonic(writer);
-		}
+	}
     }
 
     protected override IDictionary<string, string> GetControlAttributes()

src/lib/MBS.Web/UI/WebControls/ListView.cs

@@ -0,0 +1,144 @@
+using MBS.Core.Collections.Generic;
+using MBS.Web.UI.HtmlControls;
+
+namespace MBS.Web.UI.WebControls;
+
+public class ListViewItemColumn
+{
+	public class ListViewItemColumnCollection
+		: System.Collections.ObjectModel.Collection<ListViewItemColumn>
+	{
+		
+	}
+
+	public string ColumnName { get; set; }
+	public object Value { get; set; }
+
+	public ListViewItemColumn(string columnName, object value)
+	{
+		ColumnName = columnName;
+		Value = value;
+	}
+}
+
+public class ListViewItem
+{
+	public class ListViewItemCollection
+		: System.Collections.ObjectModel.Collection<ListViewItem>
+	{
+
+	}
+
+	public ListViewItemColumn.ListViewItemColumnCollection Columns { get; } = new ListViewItemColumn.ListViewItemColumnCollection();
+	
+	public ListViewItem(IEnumerable<ListViewItemColumn> columns = null)
+	{
+		if (columns != null)
+		{
+			Columns.AddRange(columns);
+		}
+	}
+}
+
+public class ListViewColumn
+{
+	public class ListViewColumnCollection
+		: System.Collections.ObjectModel.Collection<ListViewColumn>
+	{
+		private Dictionary<string, ListViewColumn> _itemsByName = new Dictionary<string, ListViewColumn>();
+		public ListViewColumn this[string name]
+		{
+			get
+			{
+				if (_itemsByName.ContainsKey(name))
+				{
+					return _itemsByName[name];
+				}
+				return null;
+			}
+		}
+
+        protected override void ClearItems()
+        {
+			foreach (ListViewColumn item in this)
+			{
+				if (_itemsByName[item.Name] == item)
+				{
+					_itemsByName.Remove(item.Name);
+				}
+			}
+            base.ClearItems();
+        }
+        protected override void RemoveItem(int index)
+        {
+            base.RemoveItem(index);
+			_itemsByName.Remove(this[index].Name);
+        }
+        protected override void InsertItem(int index, ListViewColumn item)
+        {
+            base.InsertItem(index, item);
+			_itemsByName[item.Name] = item;
+        }
+
+    }
+
+	public string Name { get; set; }
+	public string Title { get; set; }
+
+	public ListViewColumn(string name, string title)
+	{
+		Name = name;
+		Title = title;
+	}
+}
+
+public class ListView : Container
+{
+    protected override string TagName => "table";
+
+    public ListView(IEnumerable<ListViewColumn>? columns = null, IEnumerable<ListViewItem>? items = null)
+	{
+		if (columns != null)
+		{
+			Columns.AddRange(columns);
+		}
+		if (items != null)
+		{
+			Items.AddRange(items);
+		}
+	}
+
+	public ListViewColumn.ListViewColumnCollection Columns { get; } = new ListViewColumn.ListViewColumnCollection();
+	public ListViewItem.ListViewItemCollection Items { get; } = new ListViewItem.ListViewItemCollection();
+
+	private HtmlGenericControl thead = null, tbody = null;
+
+    protected override IList<Control> GetChildControls()
+    {
+		thead = new HtmlGenericControl("thead");
+		
+		HtmlGenericControl tr = new HtmlGenericControl("tr");
+		foreach (ListViewColumn lvc in Columns)
+		{
+			HtmlGenericControl th = new HtmlGenericControl("th");
+			th.Content = lvc.Title;
+			tr.Controls.Add(th);
+		}
+		thead.Controls.Add(tr);
+
+		tbody = new HtmlGenericControl("tbody");
+		foreach (ListViewItem lvi in Items)
+		{
+			HtmlGenericControl tr2 = new HtmlGenericControl("tr");
+			foreach (ListViewItemColumn col in lvi.Columns)
+			{
+				HtmlGenericControl td = new HtmlGenericControl("td");
+				td.Content = col.Value?.ToString();
+				tr2.Controls.Add(td);
+			}
+			tbody.Controls.Add(tr2);
+		}
+
+		return new Control[] { thead, tbody };
+    }
+}

src/lib/MBS.Web/WebContext.cs

@@ -2,7 +2,7 @@ namespace MBS.Web;
 
 public class WebContext
 {
-		public WebContext(WebApplication application, WebRequest request, WebResponse response, Dictionary<string, string> session)
+		public WebContext(WebApplication application, WebRequest request, WebResponse response, Dictionary<string, object> session)
 		{
 			Application = application;
 			Request = request;
@@ -14,5 +14,5 @@ public class WebContext
 		public WebRequest Request { get; }
 		public WebResponse Response { get; }
 		
-    	public Dictionary<string, string> Session { get; }
+    	public Dictionary<string, object> Session { get; }
 }

src/lib/MBS.Web/WebServer.cs

@@ -133,7 +133,7 @@ public class WebServer
 		return sb.ToString();
 	}
 
-	private Dictionary<string, Dictionary<string, string>> _sessions = new Dictionary<string, Dictionary<string, string>>();
+	private Dictionary<string, Dictionary<string, object>> _sessions = new Dictionary<string, Dictionary<string, object>>();
 
 	private void HandleClient(System.Net.Sockets.TcpClient client)
 	{
@@ -204,15 +204,18 @@ public class WebServer
 			sr.ReadBlock(buffer, 0, contentLengthInt);
 			
 			string content = new string(buffer);
-			string[] kvps = content.Split(new char[] { '&' });
-			foreach (string kvp in kvps)
+			if (!String.IsNullOrEmpty(content))
 			{
-				string[] pv = kvp.Split(new char[] { '=' });
-				form[pv[0]] = pv[1];
+				string[] kvps = content.Split(new char[] { '&' });
+				foreach (string kvp in kvps)
+				{
+					string[] pv = kvp.Split(new char[] { '=' });
+					form[pv[0]] = pv[1].Replace('+', ' ');
+				}
 			}
 		}
 
-		Dictionary<string, string> session;
+		Dictionary<string, object> session;
 		string cookie = "", cookieKey = "", cookieValue = "";
 		if (headers[HttpRequestHeader.Cookie] != null)
 		{
@@ -231,14 +234,14 @@ public class WebServer
 
 			if (!_sessions.ContainsKey(cookieValue))
 			{
-				_sessions[cookieValue] = new Dictionary<string, string>();
+				_sessions[cookieValue] = new Dictionary<string, object>();
 			}
 
 			session = _sessions[cookieValue];
 		}
 		else
 		{
-			session = new Dictionary<string, string>();
+			session = new Dictionary<string, object>();
 		}
 
 		if (cookieValue == "")