C#中“使用”的用途是什么？用戶(hù)科科斯奇妙的回答C#的隱藏特征問(wèn)題通過(guò)提及using關(guān)鍵詞。你能詳細(xì)說(shuō)明一下嗎？.的用途是什么？using?
3 回答
溫溫醬
TA貢獻(xiàn)1752條經(jīng)驗(yàn) 獲得超4個(gè)贊
using
using (MyResource myRes = new MyResource()){
myRes.DoSomething();}{ // Limits scope of myRes
MyResource myRes= new MyResource();
try
{
myRes.DoSomething();
}
finally
{
// Check for a null resource.
if (myRes != null)
// Call the object's Dispose method.
((IDisposable)myRes).Dispose();
}}
一只斗牛犬
TA貢獻(xiàn)1784條經(jīng)驗(yàn) 獲得超2個(gè)贊
using (System.IO.StreamReader r = new System.IO.StreamReader(""))using (System.IO.StreamReader r2 = new System.IO.StreamReader("")) {
//code}using (System.IO.StreamReader r = new System.IO.StreamReader(""), r2 = new System.IO.StreamReader("")) {
//code}
森欄
TA貢獻(xiàn)1810條經(jīng)驗(yàn) 獲得超5個(gè)贊
using (var conn = new SqlConnection("connection string")){
conn.Open();
// Execute SQL statement here on the connection you created}SqlConnection.Close()try/catch/finally.
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