WebHelpers.cs :  » Persistence-Frameworks » ORM.NET » OrmLib » C# / CSharp Open Source

//This file is part of ORM.NET.
//
//ORM.NET is free software; you can redistribute it and/or
//modify it under the terms of the GNU Lesser General Public
//License as published by the Free Software Foundation; either
//version 2.1 of the License, or (at your option) any later version.
//
//ORM.NET is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//Lesser General Public License for more details.
//
//You should have received a copy of the GNU Lesser General Public
//License along with ORM.NET; if not, write to the Free Software
//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
using System.Data;
using System.ComponentModel;

namespace OrmLib{
  [EditorBrowsable(EditorBrowsableState.Never)]
  public class WebHelpers
  {
    private WebHelpers(){}

    public static string GenerateRandomString()
    {
      string result = "";
      char[] letters = {'b','c','d','2','f','g','h','3','j','k','m','n','4','p','q','r','s','t','5','v','w','x','y','z' };
      System.Random r = new System.Random();
      
      for(int i = 0; i < 8; i++)
      {
        int j = r.Next( 24);
        char c = letters[j];
        result += c;
      }
      return result;      
    }

    public static void AddTableRow( Table t, params object[] values)
    {
      TableRow tr = new TableRow();
      int Pos = 0;

      foreach( object s in values)
      {
        TableCell cell = new TableCell();
        if (s == null)
          cell.Text = "&nbsp;";
        else if ((s is string) && ((string)s == ""))
          cell.Text = "&nbsp;";
        else if (!(s is string))
        {
          System.Diagnostics.Debug.WriteLine( "Adding a control");
          cell.Controls.Add( (System.Web.UI.Control)s);
        }
        else
          cell.Text = (string)s;

        if (t.Rows.Count > 0 )
        {
          cell.CopyBaseAttributes( t.Rows[0].Cells[Pos]);
          cell.VerticalAlign = t.Rows[0].Cells[Pos].VerticalAlign;
          cell.HorizontalAlign = t.Rows[0].Cells[Pos].HorizontalAlign;
        }
        
        tr.Cells.Add(cell);        

        Pos++;
      }

      t.Rows.Add(tr);
    }

    public static Hashtable GetSelectionsHash( ListItemCollection c)
    {
      Hashtable h = new Hashtable();
      foreach( ListItem li in c)
      {
        if (li.Selected == true) h.Add( li.Value, li.Value);
      }

      return h;
    }

    public static void PopulateList( DropDownList list, DataTable source, string nameColumn, string valueColumn, string selectedValue)
    {
      list.Items.Clear();
      foreach( DataRow r in source.Rows)
      {
        ListItem li = new ListItem( (string) r[nameColumn], (string) r[valueColumn]);
        if ( selectedValue == (string) r[valueColumn] ) li.Selected = true;

        list.Items.Add( li );
      }
    }

    public static void PopulateList( DropDownList list, ICollection namesValues, string selectedItem)
    {
      PopulateListNameValues(list, namesValues, namesValues, selectedItem);
    }

    public static void PopulateListNameValues( DropDownList list, ICollection names, ICollection values, string selectedItem)
    {
      ArrayList Names = new ArrayList( names );
      ArrayList Values = new ArrayList( values );

      list.Items.Clear();
      for(int i = 0; i < names.Count; i++)
      {
        ListItem li = new ListItem( (string) Names[i], (string) Values[i]);
        if ((string) Values[i] == selectedItem) li.Selected = true;

        list.Items.Add(li);
      }
    }

    public static string GetControlSelections( Page page, string name)
    {
      Control c = page.FindControl( name );
      if (c is TextBox)
        return ((TextBox)c).Text;

      if (c is DropDownList)
        return ((DropDownList)c).SelectedItem.Value;

      return "";
    }

    public static void PopulateControlSelections( Page page, string name, string value)
    {
      Control c = page.FindControl( name );
      if (c is TextBox)
      {
        ((TextBox)c).Text = value;
      }
      if (c is DropDownList)
      {
        DropDownList l = (DropDownList) c;
        foreach(ListItem li in l.Items)
        {
          if (li.Value == value) 
          {
            li.Selected = true;
            break;
          }
        }
      }
    }


  }
}