{
String mysqlStr = "Database=secondcomputer;Data Source=127.0.0.1;User Id=root;Password=123456;pooling=false;CharSet=utf8;port=3306";
// String mySqlCon = ConfigurationManager.ConnectionStrings["MySqlCon"].ConnectionString;
MySqlConnection mysql = new MySqlConnection(mysqlStr);
return mysql;
}
public static MySqlDataAdapter getSqlDataAdapter(String sql, MySqlConnection mysql)
{
MySqlDataAdapter mySqlDataAdapter = new MySqlDataAdapter(sql, mysql);
// MySqlCommand mySqlCommand = new MySqlCommand(sql);
// mySqlCommand.Connection = mysql;
return mySqlDataAdapter;
}
public static MySqlCommand getSqlCommand(String sql, MySqlConnection mysql)
{
MySqlCommand mySqlCommand = new MySqlCommand(sql, mysql);
// MySqlCommand mySqlCommand = new MySqlCommand(sql);
// mySqlCommand.Connection = mysql;
return mySqlCommand;
}
/// <summary>
/// 查询并获得结果集并遍历
/// </summary>
/// <param name="mySqlCommand"></param>
public static string getResultset(MySqlCommand mySqlCommand, int itemNumbers)
{
MySqlDataReader reader = mySqlCommand.ExecuteReader();
string messageConcat = string.Empty;
try
{
while (reader.Read())
{
if (reader.HasRows)
{
messageConcat = reader.GetInt16(0).ToString() + ";";
for (int i = 1; i < itemNumbers; i++)
{
messageConcat += reader.GetString(i) + ";";
}
//Console.WriteLine(reader.GetString(0) + "..." + reader.GetString(1) + "..." + reader.GetString(2));
}
}
return messageConcat;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
return "查询失败了！";
}
finally
{
reader.Close();
}
}
/// <summary>
/// 查询并获得结果集并遍历//目前有个bug只能查询一行的数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static Dictionary<string, string> getMessageDictionary(MySqlCommand mySqlCommand, string schemaName, string tableName)
{
MySqlDataReader reader = mySqlCommand.ExecuteReader();
Dictionary<string, string> dict = new Dictionary<string, string>();
List<string> list = getSqlColumnName(schemaName, tableName);
try
{
while (reader.Read())
{
if (reader.HasRows)
{
for (int i = 0; i < list.Count; i++)
{
if (reader.GetString(i)!=null)
{
dict.Add(list[i], reader.GetString(i));
}
else
{
dict.Add(list[i], "");
}
}
//Console.WriteLine(reader.GetString(0) + "..." + reader.GetString(1) + "..." + reader.GetString(2));
}
}
if (reader.Read()==false)
{
if (reader.HasRows)
{
for (int i = 0; i < list.Count; i++)
{
dict.Add(list[i], "");
}
}
}
return dict;
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
return dict;
}
finally
{
reader.Close();
}
}
/// <summary>
/// 查询列名
/// </summary>
/// <param name="mySqlCommand"></param>
public static List<string> getSqlColumnName(string schemaName, string tableName)
{
MySqlConnection mysql = getMySqlCon1WithSecondComputer();
List<string> columnName = new List<string>();
string sql = "select column_name from information_schema.columns where table_schema='" + schemaName + "' and table_name='" + tableName + "' ";
try
{
mysql.Open();
MySqlCommand mySqlCommand = LocalRetrospect.getSqlCommand(sql, mysql);
//SqlCommand com = new SqlCommand(sql, mysql);
MySqlDataReader reader = mySqlCommand.ExecuteReader();
while (reader.Read())
{
columnName.Add(reader[0].ToString());
}
reader.Close();
mysql.Close();
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
return columnName;
}
/// <summary>
/// 添加数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getInsert(MySqlCommand mySqlCommand)
{
try
{
mySqlCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
String message = ex.Message;
Console.WriteLine("插入数据失败了！" + message);
}
}
/// <summary>
/// 修改数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getUpdate(MySqlCommand mySqlCommand)
{
try
{
mySqlCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
String message = ex.Message;
Console.WriteLine("修改数据失败了！" + message);
}
}
/// <summary>
/// 删除数据
/// </summary>
/// <param name="mySqlCommand"></param>
public static void getDel(MySqlCommand mySqlCommand)
{
try
{
mySqlCommand.ExecuteNonQuery();
MessageBox.Show(mySqlCommand.ExecuteNonQuery().ToString());
}
catch (Exception ex)
{
}
public static int getDataNumber(string tableName)//获取表格的数据数目，也可以说是行数
{
MySqlConnection mysql = getMySqlCon1WithSecondComputer();
try
{
string sqlMsg = "select count(*)as cnt from " + tableName;
MySqlDataAdapter mySqlCommand = getSqlDataAdapter(sqlMsg, mysql);
mysql.Open();
DataSet ds = new DataSet();
mySqlCommand.Fill(ds);
mysql.Close();
return Convert.ToInt16(ds.Tables[0].Rows[0][0]);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
String message = ex.Message;
Console.WriteLine("失败了！" + message);
return -1;
}
}
public static void write_Message()//写读取指定表格的相关信息
{
try
{
MySqlConnection mysql = getMySqlCon1WithSecondComputer();
String sqlInsert = "insert into 表格名(键名,键名) values ('" +值+ "','" +值 + "')";
MySqlCommand mySqlCommand = getSqlCommand(sqlInsert, mysql);
mysql.Open();
//getResultset(mySqlCommand);
getInsert(mySqlCommand);
preholder_sn_1["preholder_sn_1"] = "";
preholder_sn_1["preholder_sn_time"] = "";
mysql.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
return;
}
}
这里是一些控件绑定数据库的例子
private void button1_Click(object sender, EventArgs e)
{
MySqlConnection myconn = null;
MySqlCommand mycom = null;
MySqlDataAdapter myrec = null;
myconn = new MySqlConnection("Host =127.0.0.1;Database=st10data;Username=root;Password=123456");
myconn.Open();
mycom = myconn.CreateCommand();
mycom.CommandText = "SELECT *FROM st10_burn_mcu_message";
MySqlDataAdapter adap = new MySqlDataAdapter(mycom);
DataSet ds = new DataSet();
adap.Fill(ds);
dataGridView1.DataSource = ds.Tables[0].DefaultView;
string sql = string.Format("select * from st10_burn_mcu_message");
mycom.CommandText = sql;
mycom.CommandType = CommandType.Text;
MySqlDataReader sdr = mycom.ExecuteReader();
int i = 0;
while (sdr.Read())
{
listView1.Items.Add(sdr[0].ToString());
listView1.Items[i].SubItems.Add(sdr[1].ToString());
i++;
}
myconn.Close();
}
private void bindListCiew()
{
this.listView1.Columns.Add("学生");
this.listView1.Columns.Add("ID");
this.listView1.Columns.Add("ID");
this.listView1.View = System.Windows.Forms.View.Details;
}