針對DataGridView中已進行過數據綁定，即已向DataGridView中添加了一些數據，可以結合Linq查詢，並讓匹配查詢的行高亮顯示，如下圖：
具體實現如下：
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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添加數據、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");
// 在這里必須創建一個BindIngSource對象，用該對象接收Dictionary<T, K>泛型集合的對象
BindingSource bindingSource = new BindingSource();
// 將泛型集合對象的值賦給BindingSourc對象的數據源
bindingSource.DataSource = map;
this.dataGridView.DataSource = bindingSource;
}
private void SearchButton_Click(object sender, EventArgs e) {
if (this.KeyWord.Text.Equals("")) {
return;
}
// Linq模糊查詢
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();
// 恢復之前行的背景顏色為默認的白色背景
this.dataGridView.Rows[beforeMatchedRowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.White;
if (list.Count > 0) {
// 查找匹配行高亮顯示
int matchedRowIndex = list[0].Index;
this.dataGridView.Rows[matchedRowIndex].DefaultCellStyle.BackColor = System.Drawing.Color.Yellow;
this.beforeMatchedRowIndex = matchedRowIndex;
}
}
}
}