删除字典！

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        //所有项目啊
        public List<HealthCheckItem> AllItem=new List<HealthCheckItem>();
        public HealthCheckSet healthset;
        //字典存套餐
        public Dictionary<string,HealthCheckSet> setdic=new Dictionary<string,HealthCheckSet>();

        
        public Form1()
        {
            InitializeComponent();
           
        }
        //loding
        private void Form1_Load(object sender, EventArgs e)
        {
            Init();
            //项目
            this.cmbitem.DataSource = AllItem;
            this.cmbitem.DisplayMember = "name";

            //套餐
            foreach(string key in setdic.Keys)
            {
                this.cmbset.Items.Add(key);
            }

            
            

           
            
            
        }
        //初始化
        public void Init() 
        {
            HealthCheckItem hci = new HealthCheckItem("用于检查身高","身高",5);
            HealthCheckItem hci1 = new HealthCheckItem("用于检查体重", "体重", 5);
            HealthCheckItem hci2 = new HealthCheckItem("用于检查肝功能", "肝功能", 30);
            HealthCheckItem hci3 = new HealthCheckItem("用于B超检查", "B超", 50);
            HealthCheckItem hci4 = new HealthCheckItem("用于检查身高1", "身高adf", 5);
            HealthCheckItem hci5 = new HealthCheckItem("用于检查体重1", "体重adf", 5);
            HealthCheckItem hci6 = new HealthCheckItem("22222", "11", 30);
            HealthCheckItem hci7 = new HealthCheckItem("33333B超检查", "B213", 50);
            HealthCheckItem hci8= new HealthCheckItem("44444", "A", 5);
            HealthCheckItem hci9 = new HealthCheckItem("444", "B", 5);
            HealthCheckItem hci10 = new HealthCheckItem("44", "C", 30);
            //HealthCheckItem hci33 = new HealthCheckItem("用于B5", "BD", 50);
            //HealthCheckItem hci111 = new HealthCheckItem("7", "E", 5);
            //HealthCheckItem hci1111 = new HealthCheckItem("64", "F", 5);
            //HealthCheckItem hci2222 = new HealthCheckItem("6", "G", 30);
            //HealthCheckItem hci3333 = new HealthCheckItem("用于B5", "H", 50);
            //HealthCheckItem hci444 = new HealthCheckItem("用于检查4", "HH", 5);
            //HealthCheckItem hci114 = new HealthCheckItem("用于3体重AC", "I", 5);
            //HealthCheckItem hci2212 = new HealthCheckItem("用于2功能EE", "II", 30);
            //HealthCheckItem hci3231 = new HealthCheckItem("用于1检查ADF", "BII", 50);

            AllItem.Add(hci);
            AllItem.Add(hci1);
            AllItem.Add(hci2);
            AllItem.Add(hci3);
            AllItem.Add(hci4);
            AllItem.Add(hci5);
            AllItem.Add(hci6);
            AllItem.Add(hci7);
            AllItem.Add(hci8);
            AllItem.Add(hci9);
            AllItem.Add(hci10);
            

            healthset = new HealthCheckSet();
            healthset.Name = "入学套餐";
            healthset.Items.Add(hci4);
            healthset.Items.Add(hci5);
            healthset.Items.Add(hci6);
            healthset.Items.Add(hci7);
            healthset.CalcPrice();

            setdic.Add("入学套餐", healthset);


            healthset = new HealthCheckSet();
            healthset.Name = "普通套餐";
            healthset.Items.Add(hci1);
            healthset.Items.Add(hci2);
            healthset.Items.Add(hci4);
            healthset.Items.Add(hci5);
            healthset.CalcPrice();

            setdic.Add("普通套餐", healthset);
        }
        //刷新
        public void Update(HealthCheckSet set)
        {
            this.dataGridView1.DataSource = new BindingList<HealthCheckItem>(set.Items);
            set.CalcPrice();
        }


        private void groupBox1_Enter(object sender, EventArgs e)
        {
        
        }
        //================新加套餐
        private void btnAddSet_Click(object sender, EventArgs e)
        {
            healthset = new HealthCheckSet();
            string name = this.txtsetname.Text.Trim();
            healthset.Name = name;
            setdic.Add(name,healthset);
            foreach (string key in setdic.Keys)
            {
                this.cmbset.Items.Add(key);
            }

            

        }
        //================删除
        private void btndel_Click(object sender, EventArgs e)
        {
            string name = this.cmbitem.Text.ToString();
            string setname = this.cmbset.Text.ToString();
            foreach (HealthCheckItem item in AllItem)
            {
                if (item.name == name)
                {
                    if (setdic[name].Items.Contains(item))
                    {
                       HealthCheckSet hs   = setdic[name];
                       hs.Items.Remove(item);
                        Update(hs);
                        break;
                    }
                    else
                    {
                        MessageBox.Show("该套餐没有此项目");
                    }
                    break;
                }
            }
            
        }

        private void labname_Click(object sender, EventArgs e)
        {

        }


        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            string name = this.cmbset.SelectedItem.ToString();
           // foreach (string key in setdic.Keys)
           // {
                this.dataGridView1.DataSource = setdic[name];
           // }
            
        }
        //=====================显示套餐
        public void show() 
        {

        }
        private void cmbset_SelectedIndexChanged(object sender, EventArgs e)
        {
            string setName = cmbset.SelectedItem.ToString();
            

            if (setdic.ContainsKey(setName))
            {
                HealthCheckSet hs = setdic[setName];
                this.dataGridView1.DataSource = hs.Items;
                this.labname.Text = setName;
                this.labpri.Text = hs.Price + "";
                
            }
            
            
            
        }
        //=====================添加检查项目
        private void btnAdd_Click(object sender, EventArgs e)
        {
            //添加的检查项目
            string name = cmbitem.Text.ToString();
            //当前的套餐名
            string setname = this.cmbset.Text.ToString();
            
            HealthCheckSet hcs = setdic[setname];
            //得到选中的项目

            if (setdic[setname] != null)
            {
                foreach (HealthCheckItem item in AllItem)
                {
                    if (item.name == name)
                    {
                        if (hcs.Items.Contains(item))
                        {
                            
                            MessageBox.Show("该项目已经存在");
                        }
                        else
                        {
                            //this.btnAdd.Visible = true;
                            hcs.Items.Add(item);
                            hcs.CalcPrice();
                            Update(hcs);
                            break;

                        }
                    }
                 }

            }
            else
            {
                MessageBox.Show("没有该套餐");
            }
 

            
        }

        private void labpri_Click(object sender, EventArgs e)
        {
            //string name = this.cmbset.Text.ToString();
            //int money=setdic[name].CalcPrice;
            
        }

        private void cmbitem_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        private void cmbitem_SelectedIndexChanged(object sender, EventArgs e)
        {
            string name = cmbitem.Text.ToString();
            //当前的套餐名
            string setname = this.cmbset.Text.ToString();

            
            //得到选中的项目

            if (setname !="请选择")
            {
                foreach (HealthCheckItem item in AllItem)
                {
                    if (item.name == name)
                    {
                        HealthCheckSet hcs = setdic[setname];
                        if (hcs.Items.Contains(item))
                        {
                            this.btnAdd.Enabled = false;
                            //MessageBox.Show("该项目已经存在");
                        }
                        else
                        {
                            this.btnAdd.Enabled = true;
                            hcs.Items.Add(item);
                            hcs.CalcPrice();
                            Update(hcs);
                            break;

                        }
                    }
                }

            }
            else
            {
                return;
            }
        }
}

这是效果。如果添加的已经有了，则添加按纽显示不可用。现在的情况是一有添加过的，按纽永久是不可用的。删除的时候说if (setdic[name].Items.Contains(item))
                    {
                       HealthCheckSet hs   = setdic[name];
                       hs.Items.Remove(item);
                        Update(hs);
                        break;
                    }给定关键字不在字典中。 没明白啥意思呢。
}
--------------------编程问答-------------------- 加断点跟踪一下就知道了 --------------------编程问答-------------------- 你说有人会看么、上来就一大堆
--------------------编程问答-------------------- 你只给出了FROM.CS的代码，前台DESIGN的代码没给，你的类HealthCheckItem没给出，虽然可以根据读代码能判断出来，但是明显你的代码给的不完整。还好有截图，不然估计难度会大些。有空帮你瞧瞧。 --------------------编程问答-------------------- 你调试一下吧。 这个问题应该好弄。 --------------------编程问答-------------------- 你的字典里存的是以setname为key的数据，你用name当然查不到了，要换成setname就好用了。
if (setdic[setname].Items.Contains(item))
                    {
                        HealthCheckSet hs = setdic[setname];
                        hs.Items.Remove(item);
                        Update(hs);
                        break;
                    }

补充：.NET技术 ,  C#