1. SQL Server數據庫通過代碼操作： 數據庫創建，表創建，增刪改查操作，可參考下面代碼鏈接：
https://www.c-sharpcorner.com/article/create-a-sql-server-database-dynamically-in-C-Sharp/
其中需要注意的事項爲：
private string ConnectionString ="Integrated Security=SSPI;" + "Initial Catalog=;" + Data Source=localhost;";
Integrated Security=SSPI 爲用當前Windows賬號密碼進行登陸，Initial Catalog=指定數據庫名字，等同於DataBase
2. 上面只能當前電腦訪問數據庫，如果想局域網訪問數據庫，或者外網訪問數據庫，可以參考下面步驟來：
首先要單獨創建個數據的登陸賬號，密碼。(我之前用Windows賬號，密碼登陸一直登陸不上，才採用這種方式)
SQL Server 本地新建登陸名，密碼方法如下鏈接：https://blog.csdn.net/SHK242673/article/details/106408489
3. 下面爲SQL Server本地局域網連接代碼：
private string ConnectionString = "SERVER=192.168.10.29;" + "UID=test;" + "PWD=test;" + "DATABASE=;" + "Persist Security Info=True;";
private string DataBase_Name = "My_DB.mdf";
private string DataBase_TableName = "my_table";
private SqlConnection sql_conn = null;
private SqlCommand sql_cmd = null;
創建數據庫
private void CreateDataBase(string DataBase_Name)
{
// Create a connection
sql_conn = new SqlConnection(ConnectionString);
// Open the connection
if (sql_conn.State != ConnectionState.Open)
sql_conn.Open();
string sql_createDataBase = "CREATE DATABASE my_db ON PRIMARY"
+ "(Name=my_data, filename='" + DataBase_Name + "', size=10Mb,maxsize=100Mb, filegrowth=1Kb)";
ExecuteSQLStmt(sql_createDataBase);
MessageBox.Show("創建數據庫: " + DataBase_Name + " 成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
private void ExecuteSQLStmt(string sql)
{
if (sql_conn.State == ConnectionState.Open)
sql_conn.Close();
if (System.IO.File.Exists(DataBase_Name ))
{
ConnectionString = "SERVER=192.168.10.29;" + "UID=test;" + "PWD=test;" + "DATABASE=my_db ;" + "Persist Security Info=True;";
}
MessageBox.Show("數據庫 connectString: " + ConnectionString + " 成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
sql_conn.ConnectionString = ConnectionString;
sql_conn.Open();
sql_cmd = new SqlCommand(sql, sql_conn);
try
{
sql_cmd.ExecuteNonQuery();
}
catch (SqlException ae)
{
//MessageBox.Show(ae.Message.ToString(), "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
創建表：
private void CreateTable(string Table_Name)
{
// Open the connection
if (sql_conn.State == ConnectionState.Open)
sql_conn.Close();
ConnectionString = "SERVER=192.168.10.29;" + "UID=test;" + "PWD=test;" + "DATABASE=my_db ;" + "Persist Security Info=True;";
MessageBox.Show("創建數據表：ConnectionString: " + ConnectionString, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
sql_conn.ConnectionString = ConnectionString;
sql_conn.Open();
string sql_createTable = "CREATE TABLE " + Table_Name +
"(taskId BIGINT CONSTRAINT PKeyMyId PRIMARY KEY," +
"taskName CHAR(300), projectName CHAR(100), brandName CHAR(100))";
MessageBox.Show("創建數據表：sql_createTable: " + sql_createTable, "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
sql_cmd = new SqlCommand(sql_createTable, sql_conn);
try
{
sql_cmd.ExecuteNonQuery();
}
catch(SqlException ae)
{
}
MessageBox.Show("創建數據表：" + Table_Name + "成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
查詢數據庫
private void querry_database(string select_name)
{
string sql_select = "select * from " + DataBase_TableName + " where taskName='" + select_name+ "'";
sql_cmd = new SqlCommand(sql_select, sql_conn);
using (SqlDataReader reader = sql_cmd.ExecuteReader())
{
while (reader.Read())
{
//獲取表裏面的字段信息
MessageBox.Show("taskId: " + reader.GetInt64(0) + " taskName: " + reader.GetString(1) + " projectName" + reader.GetString(2) + " brandName: " + reader.GetString(3), "提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
上面代碼爲運行成功的部分核心代碼，參考這個來，稍微修改就可以用。
突然搞C# SQL Server 有點蒙，先記錄下，給初學者分享下。