SqlCommand

MSSQL/ADO_02_SqlCommand/.vscode/launch.json

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+{
+   // Use IntelliSense to find out which attributes exist for C# debugging
+   // Use hover for the description of the existing attributes
+   // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+   "version": "0.2.0",
+   "configurations": [
+        {
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/bin/Debug/netcoreapp3.1/ADO_02_SqlCommand.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach",
+            "processId": "${command:pickProcess}"
+        }
+    ]
+}

MSSQL/ADO_02_SqlCommand/.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/ADO_02_SqlCommand.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/ADO_02_SqlCommand.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "${workspaceFolder}/ADO_02_SqlCommand.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

MSSQL/ADO_02_SqlCommand/ADO_02_SqlCommand.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="System.Data.SqlClient" Version="4.8.1" />
+  </ItemGroup>
+
+</Project>

MSSQL/ADO_02_SqlCommand/Program.cs

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+using System;
+
+namespace SqlCommandExam
+{
+    partial class Program
+    {
+        static void Main(string[] args)
+        {
+            // CreateSqlCommand01();
+            // InsertNewShipper();
+            // InsertNewShipperExecuteNonQuery();
+            // ReadCategory();
+            CallStoredProcedure();
+        }
+    }
+}

MSSQL/ADO_02_SqlCommand/Readme.md

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+```
+dotnet add package System.Data.SqlClient
+```
+
+https://xuanthulab.net/ado-net-sqlcommand-truy-van-va-cap-nhat-du-lieu-c-sql-server.html
+

MSSQL/ADO_02_SqlCommand/callProcedure.cs

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+using System;
+using System.Data;
+using System.Data.SqlClient;
+
+namespace SqlCommandExam
+{
+    public partial class Program
+    {
+      public static void CallStoredProcedure()
+      {
+            string sqlconnectStr     = "Data Source=localhost,1433;Initial Catalog=xtlab;User ID=SA;Password=Password123";
+            SqlConnection connection = new SqlConnection(sqlconnectStr);
+            connection.Open();
+
+            // Thi hành thủ tục PROCEDURE [dbo].[getproduct](@id int) trong MS SQL Server
+            SqlCommand cmd   = new SqlCommand("getproduct", connection);
+            cmd.CommandType  = CommandType.StoredProcedure;
+            // Tham số của procedure
+            cmd.Parameters.Add(
+                new SqlParameter() {
+                    ParameterName   = "@id",
+                    SqlDbType       = SqlDbType.Int,
+                    Value           = 10
+                }
+            );
+
+            // Đọc kết quả trả về
+            using (SqlDataReader reader = cmd.ExecuteReader())
+            {
+                while (reader.Read())
+                {
+                    var ten = reader["TenSanpham"];
+                    var gia = reader["Gia"];
+
+                    Console.WriteLine($"{ten} \t {gia}");
+                }
+            }
+
+
+          connection.Close();
+      }
+    }
+}

MSSQL/ADO_02_SqlCommand/createSqlCommad1.cs

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+using System;
+using System.Data;
+using System.Data.SqlClient;
+
+namespace SqlCommandExam {
+  public partial class Program {
+    public static void CreateSqlCommand01 () {
+
+      // Mở kết nối đến SQL Server
+      string sqlconnectStr = "Data Source=localhost,1433;Initial Catalog=xtlab;User ID=SA;Password=Password123";
+      SqlConnection connection = new SqlConnection (sqlconnectStr);
+      connection.Open ();
+
+      string queryString = "SELECT TenDanhMuc, MoTa FROM Danhmuc";
+      using (SqlCommand cmd = new SqlCommand (queryString, connection)) {
+        // Mã sử dụng SqlCommand ở đây
+        // Thiết lập tham số cmd cmd.Parameters nếu cần thiết
+        // Thi hành lệnh  (như ) cmd.ExecuteReader(); ...
+        using (SqlDataReader reader = cmd.ExecuteReader ()) {
+          // Đoạn này đọc dữ liệu do SqlCommand trả về, đọc ở phần sau
+          DataTable myTable = new DataTable ();
+          myTable.Load (reader);
+          foreach (DataRow dataRow in myTable.Rows) {
+            foreach (var item in dataRow.ItemArray) {
+              Console.Write ($"{item} ");
+            }
+            Console.WriteLine ();
+          }
+
+        }
+      }
+      // Đóng kết nối khi không còn dùng
+      connection.Close ();
+
+    }
+  }
+}

MSSQL/ADO_02_SqlCommand/insertShipper.cs

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+using System;
+using System.Data;
+using System.Data.SqlClient;
+
+namespace SqlCommandExam
+{
+    public partial class Program
+    {
+      public static void InsertNewShipper()
+      {
+            // Mở kết nối MS SQL Server
+            string sqlconnectStr     = "Data Source=localhost,1433;Initial Catalog=xtlab;User ID=SA;Password=Password123";
+            SqlConnection connection = new SqlConnection(sqlconnectStr);
+            connection.Open();
+
+            // Câu truy vấn gồm: chèn dữ liệu vào và lấy định danh(Primary key) mới chèn vào
+            string queryString = @"INSERT INTO Shippers (Hoten, Sodienthoai) VALUES (@Hoten, @Sodienthoai);
+                                   SELECT CAST(scope_identity() AS int)";
+
+            using (SqlCommand cmd = connection.CreateCommand()) {
+                cmd.CommandText = queryString;
+                cmd.Parameters.AddWithValue("@Hoten", "ABC");
+                cmd.Parameters.AddWithValue("@Sodienthoai", 123456);
+                var id = cmd.ExecuteScalar();
+                Console.WriteLine($"ID dữ liệu: {id}");
+
+            }
+
+            connection.Close();
+
+
+      }
+    }
+}

MSSQL/ADO_02_SqlCommand/insertShipper2.cs

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+using System;
+using System.Data;
+using System.Data.SqlClient;
+
+namespace SqlCommandExam
+{
+    public partial class Program
+    {
+      public static void InsertNewShipperExecuteNonQuery()
+      {
+            // Mở kết nối MS SQL Server
+            string sqlconnectStr     = "Data Source=localhost,1433;Initial Catalog=xtlab;User ID=SA;Password=Password123";
+            SqlConnection connection = new SqlConnection(sqlconnectStr);
+            connection.Open();
+
+            // Câu truy vấn gồm: chèn dữ liệu vào và lấy định danh(Primary key) mới chèn vào
+            string queryString = @"INSERT INTO Shippers (Hoten, Sodienthoai) VALUES (@Hoten, @Sodienthoai)";
+
+            using (SqlCommand cmd = connection.CreateCommand()) {
+                cmd.CommandText = queryString;
+                cmd.Parameters.AddWithValue("@Hoten", "XYZ");
+                cmd.Parameters.AddWithValue("@Sodienthoai", 223344);
+                var rows = cmd.ExecuteNonQuery();
+                Console.WriteLine($"Số dòng ảnh hưởng: {rows}");
+
+            }
+
+            connection.Close();
+
+
+      }
+    }
+}

MSSQL/ADO_02_SqlCommand/readCate.cs

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+using System;
+using System.Data;
+using System.Data.SqlClient;
+
+namespace SqlCommandExam
+{
+    public partial class Program
+    {
+      public static void ReadCategory()
+      {
+          string sqlconnectStr     = "Data Source=localhost,1433;Initial Catalog=xtlab;User ID=SA;Password=Password123";
+          SqlConnection connection = new SqlConnection(sqlconnectStr);
+          connection.Open();
+
+          using (SqlCommand command = new SqlCommand("SELECT DanhmucID, TenDanhMuc FROM Danhmuc;", connection))
+          using (SqlDataReader reader = command.ExecuteReader())
+          {
+              // Kiểm tra có kết quả trả về
+              if (reader.HasRows)
+              {
+                  // Đọc từng dòng kết quả cho đế hết
+                  while (reader.Read())
+                  {
+                      // Mỗi lần thực hiện read.Read() con trỏ sẽ dịch chuyển đến dòng dữ liệu tiếp
+                      // theo nếu có.
+                      // Đọc dòng dữ liệu dòng hiện tại dùng ký hiệu [chỉ-số-cột] hoặc các hàmg lấy dữ liệu
+                      // từng cột như reader.GetInt21(chỉ-số-cột)
+                      Console.WriteLine("{0}\t{1}", reader[0].ToString(), reader.GetString(1));
+                  }
+              }
+              else  Console.WriteLine("No rows found.");
+          }
+
+          connection.Close();
+      }
+    }
+}