C#使用Linq对DataGridView进行模糊查找

　　针对DataGridView中已进行过数据绑定，即已向DataGridView中添加了一些数据，可以结合Linq查询，并让匹配查询的行高亮显示，如下图：

　　

　　具体实现如下：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Windows.Forms;

 namespace Maxes_PC_Client {
     public partial class frmWelcome : Form {
         private int beforeMatchedRowIndex = 0;

         public frmWelcome()
         {
             InitializeComponent();
         }

         private void frmWelcome_Load(object sender, EventArgs e) {
             this.dataGridViewInit();
         }

         /// <summary>
         /// DataGridView添加数据、初始化
         /// </summary>
         private void dataGridViewInit() {
             Dictionary<String, String> map = new Dictionary<String, String>();
             map.Add("Lily", "22");
             map.Add("Andy", "25");
             map.Add("Peter", "24");

             // 在这里必须创建一个BindIngSource对象，用该对象接收Dictionary<T, K>泛型集合的对象
             BindingSource bindingSource = new BindingSource();
             // 将泛型集合对象的值赋给BindingSourc对象的数据源
             bindingSource.DataSource = map;

             this.dataGridView.DataSource = bindingSource;
         }

         private void SearchButton_Click(object sender, EventArgs e) {
             if (this.KeyWord.Text.Equals("")) {
                 return;
             }

             // Linq模糊查询
             IEnumerable<DataGridViewRow> enumerableList = this.dataGridView.Rows.Cast<DataGridViewRow>();
             List<DataGridViewRow> list = (from item in enumerableList
                                           where item.Cells[0].Value.ToString().IndexOf(this.KeyWord.Text) >= 0
                                           select item).ToList();

             // 恢复之前行的背景颜色为默认的白色背景
             this.dataGridView.Rows[beforeMatchedRowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.White;

             if (list.Count > 0) {
                 // 查找匹配行高亮显示
                 int matchedRowIndex = list[0].Index;
                 this.dataGridView.Rows[matchedRowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.Yellow;
                 this.beforeMatchedRowIndex = matchedRowIndex;
             }
         }
     }
 }