C# ListBox 左移、右移、上移、下移

C# ListBox 左移、右移、上移、下移  

2012-11-17 22:53:45|  分类： 技术研讨 |  标签：listbox  |字号 订阅

 

 

 /// <summary>
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void listBoxOperate_OnCommand(object sender, EventArgs e)
        {
            Button btn = sender as Button;

            List<string> list = new List<string>();

            switch (btn.Tag.ToString())
            {
                case "ToRight":
                    if (listBox1.SelectedItems != null)
                    {
                        foreach (var item in listBox1.SelectedItems)
                        {
                            listBox2.Items.Add(item.ToString());
                        }
                        this.listBox2.SelectedIndex = this.listBox2.Items.Count - 1;
                        for (int i = 0; i < listBox1.SelectedIndices.Count; i++)
                        {
                            listBox1.Items.RemoveAt(listBox1.SelectedIndices[i]);
                            i--;
                        }
                    }
                    break;
                case "AllToRight":
                    if (this.listBox1.Items.Count > 0)
                    {
                        for (int i = 0; i < listBox1.Items.Count; i++)
                        {
                            list.Add(listBox1.Items[i].ToString());
                        }
                        for (int j = 0; j < list.Count; j++)
                        {
                            this.listBox2.Items.Add(list[j]);
                        }
                        this.listBox1.Items.Clear();
                        break;
                    }
                    else
                    {
                        break;
                    }
                case "ToLeft":
                   
                    if (listBox2.SelectedItems != null)
                    {
                        foreach (var item in listBox2.SelectedItems)
                        {
                            listBox1.Items.Add(item.ToString());
                        }
                        this.listBox1.SelectedIndex = this.listBox1.Items.Count - 1;
                        for (int i = 0; i < listBox2.SelectedIndices.Count; i++)
                        {
                            listBox2.Items.RemoveAt(listBox2.SelectedIndices[i]);
                            i--;
                        }
                    }
                    break;
                case "AllToLeft":
                    if (this.listBox2.Items.Count > 0)
                    {

                        for (int i = 0; i < listBox2.Items.Count; i++)
                        {
                            list.Add(listBox2.Items[i].ToString());
                        }
                        for (int j = 0; j < list.Count; j++)
                        {
                            this.listBox1.Items.Add(list[j]);
                        }
                        this.listBox2.Items.Clear();
                        break;
                    }
                    else
                    {
                        break;
                    }
                case "ToUp":
                    // 上移
                    if (this.listBox2.SelectedIndices.Count > 0 &&
                        this.listBox2.SelectedIndices[0] > 0)
                    {
                        int[] newIndices =
                            this.listBox2.SelectedIndices.Cast<int>()
                            .Select(index => index - 1).ToArray();

                        this.listBox2.SelectedItems.Clear();

                        for (int i = 0; i < newIndices.Length; i++)
                        {
                            object obj = this.listBox2.Items[newIndices[i]];
                            this.listBox2.Items[newIndices[i]] = this.listBox2.Items[newIndices[i] + 1];
                            this.listBox2.Items[newIndices[i] + 1] = obj;
                            this.listBox2.SelectedItems.Add(this.listBox2.Items[newIndices[i]]);
                        }
                    }

                    break;
                case "ToDown":

                    // 下移
                    if (this.listBox2.SelectedIndices.Count > 0 &&
                        this.listBox2.SelectedIndices[this.listBox2.SelectedIndices.Count - 1] <
                        this.listBox2.Items.Count - 1)
                    {
                        int[] newIndices =
                            this.listBox2.SelectedIndices.Cast<int>()
                            .Select(index => index + 1).ToArray();

                        this.listBox2.SelectedItems.Clear();

                        for (int i = newIndices.Length; i > 0; i--)
                        {
                            object obj = this.listBox2.Items[newIndices[i - 1]];
                            this.listBox2.Items[newIndices[i - 1]] = this.listBox2.Items[newIndices[i-1]-1];
                            this.listBox2.Items[newIndices[i-1]-1] = obj;
                            this.listBox2.SelectedItems.Add(this.listBox2.Items[newIndices[i-1]]);

                        }
                    }
                    break;
            }
        }

注意：此方法只是简单的顺序移动，如果某一listbox涉及其事件时，就要加条件！