前方一致
* StartsWith() を使用する
サンプル
// 店舗クラス
class Shop
{
public int ShopId;
public string ShopName;
}
private void button1_Click(object sender, EventArgs e)
{
var shops = new[]
{
new Shop() {ShopId = 1, ShopName = "shop1_A01"},
new Shop() {ShopId = 2, ShopName = "shop1_A02"},
new Shop() {ShopId = 3, ShopName = "shop2_B01"},
new Shop() {ShopId = 4, ShopName = "shop2_B02"},
new Shop() {ShopId = 5, ShopName = "shop3_A01"},
new Shop() {ShopId = 6, ShopName = "shop4_A01"},
};
var results = shops.Where(x => x.ShopName.StartsWith("shop1"));
string output = string.Empty;
foreach (var result in results)
{
output = output + result.ShopId + " ";
}
this.label1.Text = output;
}
出力結果
1 2
後方一致
* EndsWith() を使用する
サンプル
// 店舗クラス
class Shop
{
public int ShopId;
public string ShopName;
}
private void button1_Click(object sender, EventArgs e)
{
var shops = new[]
{
new Shop() {ShopId = 1, ShopName = "shop1_A01"},
new Shop() {ShopId = 2, ShopName = "shop1_A02"},
new Shop() {ShopId = 3, ShopName = "shop2_B01"},
new Shop() {ShopId = 4, ShopName = "shop2_B02"},
new Shop() {ShopId = 5, ShopName = "shop3_A01"},
new Shop() {ShopId = 6, ShopName = "shop4_A01"},
};
var results = shops.Where(x => x.ShopName.EndsWith("A01"));
string output = string.Empty;
foreach (var result in results)
{
output = output + result.ShopId + " ";
}
this.label1.Text = output;
}
出力結果
1 5 6
部分一致
* Contains() を使用する
サンプル
// 店舗クラス
class Shop
{
public int ShopId;
public string ShopName;
}
private void button1_Click(object sender, EventArgs e)
{
var shops = new[]
{
new Shop() {ShopId = 1, ShopName = "shop1_A01"},
new Shop() {ShopId = 2, ShopName = "shop1_A02"},
new Shop() {ShopId = 3, ShopName = "shop2_B01"},
new Shop() {ShopId = 4, ShopName = "shop2_B02"},
new Shop() {ShopId = 5, ShopName = "shop3_A01"},
new Shop() {ShopId = 6, ShopName = "shop4_A01"},
};
var results = shops.Where(x => x.ShopName.Contains("_A0"));
string output = string.Empty;
foreach (var result in results)
{
output = output + result.ShopId + " ";
}
this.label1.Text = output;
}
出力結果
1 2 5 6