彩色下拉框的实现（源码）

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转载最新推荐文章于 2026-04-03 10:02:00 发布 385 阅读 AI 写同款· GEO 优化 ›

用Qt写了个WiFi网络质量检测工具：实时Ping、彩色表格、动态图表、CSV导出，信创系统也能用本文介绍了一个基于Qt C++开发的图形化网络检测工具，解决了传统命令行ping操作繁琐、数据不直观的问题。该工具具有多网卡选择、实时彩色表格显示、延迟等级评价、动态趋势图表和CSV导出等功能，支持Windows、Linux和macOS系统。文章详细展示了工具的核心功能、实现原理（包括跨平台适配、正则匹配和界面设计）以及使用教程。开发者还分享了后续更新计划，包括多IP对比测试和HTML报告生成等。该工具特别适合需要频繁排查网络问题的技术人员使用，源码已完整打包供下载学习。阅读详情

//前台代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>彩色下拉框源码的实现</title>
</head>
<body>
    <form id="form1" runat="server">
    <div style="margin-left:50px; margin-top:50px;">
    <table>
    <tr>
    <td>
    <asp:DropDownList ID ="ddlMultiColor"    runat="server" AutoPostBack="true">
    </asp:DropDownList>
    </td>
    <td>
    <div id="msgColor" runat="server" >
    </div>
    </td>
    </tr>
    </table>
    </div>
    </form>
</body>
</html>

//后台代码
using System;
using System.Web;
using System.Reflection;
using System.Drawing;
using System.Collections.Generic;

public partial class _Default : System.Web.UI.Page
{
    #region Protected method
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack == false)
        {
            populateDdlMultiColor();
            colorManipulation();
        }
    }
    protected void ddlMultiColor_OnSelectedIndexChanged(object sender, EventArgs e)
    {
        ddlMultiColor.BackColor = Color.FromName(ddlMultiColor.SelectedItem.Text);
        colorManipulation();
        ddlMultiColor.Items.FindByValue(ddlMultiColor.SelectedValue).Selected = true;
        msgColor.Attributes.Add("style", "background:" + ddlMultiColor.SelectedItem.Value + ";width:30px;height:25px;");
    }
#endregion
    #region private method
    private void colorManipulation()
    {
        int row;
        for (row = 0; row < ddlMultiColor.Items.Count - 1; row++)
        {
            ddlMultiColor.Items[row].Attributes.Add("style", "background-color:" + ddlMultiColor.Items[row].Value);
        }
        ddlMultiColor.BackColor = Color.FromName(ddlMultiColor.SelectedItem.Text);
    }
    private List<string> finalColorList()
    {

        string[] allColors = Enum.GetNames(typeof(System.Drawing.KnownColor));
        string[] systemEnvironmentColors = new string[(typeof(System.Drawing.SystemColors)).GetProperties().Length];
        int index = 0;

        foreach (MemberInfo member in (typeof(System.Drawing.SystemColors)).GetProperties())
        {
            systemEnvironmentColors[index ++] = member.Name;
        }
        List<string> finalColorList = new List<string>();

        foreach (string color in allColors)
        {
            if (Array.IndexOf(systemEnvironmentColors, color) < 0)
            {
                finalColorList.Add(color);
            }
        }
        return finalColorList;

    }
    private void populateDdlMultiColor()
    {
        ddlMultiColor.DataSource = finalColorList();
        ddlMultiColor.DataBind();
    }
    #endregion
}