progressbar.cs

本系统是在asp版《在线文件管理器》的基础上设计制作

//------------------------------------------------------------------------------
// <copyright company="Telligent Systems">
//     Copyright (c) Telligent Systems Corporation.  All rights reserved.
// </copyright> 
//------------------------------------------------------------------------------

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

using CommunityServer.Components;

namespace CommunityServer.Discussions.Controls.PostDisplay 
{

    /// <summary>
    /// Progress bar control is used for multiple purposes to 
    /// display the progress or status of a particular action
    /// for example, it can be used as bars in the voting control
    /// </summary>
    [
    DefaultProperty("Text"),
    ]
    public class ProgressBar : Control, INamingContainer 
    {

        // Member variables
        //
        int maxWidth = 250;
        float progress = 0;				// Percentage out of 100

        // Set the percentage of progress
        //
        public float PercentageOfProgress 
        {
            get 
            {
                return progress;
            }
            set 
            {

                // Ensure it falls in the correct bounds
                //
                if (value > 100)	// Greater than 100 is still 100
                    progress = 1;
                else if (value < 0)	// Less than 0 is stil 0
                    progress = 0;

                progress = ((float) value) / 100;
            }
        }

        public int Width 
        {
            get 
            {
                return  (int) (PercentageOfProgress * (float) maxWidth);
            }
        }

        // Render the progress bar
        //
        protected override void Render(HtmlTextWriter output) 
        {

            Image start = new Image();
            Image mid = new Image();
            Image end = new Image();
            Image noneMid = new Image();
            Image noneEnd = new Image();

            start.ImageUrl = Globals.GetSkinPath() + "/images/poll_a_start.gif";
            start.Height = 19;

            mid.ImageUrl = Globals.GetSkinPath() + "/images/poll_a_mid.gif";
            mid.Height = 19;

            noneMid.ImageUrl = Globals.GetSkinPath() + "/images/poll_none_mid.gif";
            noneMid.Height = 19;

            end.ImageUrl = Globals.GetSkinPath() + "/images/poll_a_end.gif";
            end.Height = 19;

            noneEnd.ImageUrl = Globals.GetSkinPath() + "/images/poll_none_end.gif";
            noneEnd.Height = 19;

            start.RenderControl(output);

            if (PercentageOfProgress > 0) 
            {
                mid.Width = Width;
                noneMid.Width = (maxWidth - Width);

                mid.RenderControl(output);
                end.RenderControl(output);
                noneMid.RenderControl(output);
            } 
            else 
            {
                noneMid.Width = maxWidth + 7;

                noneMid.RenderControl(output);
            }

            noneEnd.RenderControl(output);
            /*
            // Create 20 cells
            for (int i = 0; i < 20; i++ ) {
                TableCell td = new TableCell();
                td.Width = 5;
                td.Height = 16;

                // How should we fill this table?
                //
                if (i < percentOfProgress)
                    td.BackColor = this.ForeColor;
                else
                    td.BackColor = this.BackColor;

                // Add cell to row
                //
                row.Cells.Add(td);
            }

            this.Controls.Add(table);
            table.RenderControl(output);
            */
        }
    }
}