连接数据库
源代码:

private void Page_Load(object sender, System.EventArgs e)
{

myConnection = new SqlConnection("server=localhost;" +
"database=zhishi;uid=scm;pwd=scm");

//if (!IsPostBack) BindGrid();
}

查询数据库

源代码:

public void BindGrid()
{

myConnection = new SqlConnection("server=localhost;" +
"database=zhishi;uid=scm;pwd=scm");

SqlDataAdapter myCommand = new SqlDataAdapter("SELECT top 10 * FROM" +
" wujml", myConnection);

DataSet ds = new DataSet();
myCommand.Fill(ds);

MyDataGrid.DataSource=ds;
MyDataGrid.DataBind();

}

增删改数据库

源代码:

public void AddAuthor_Click()
{

String insertCmd = "insert into wujml(wujid,wujbt,wujlj1) "+
"values ('99999','111','3131')";

SqlCommand myCommand = new SqlCommand(insertCmd, myConnection);
myCommand.Connection.Open();

try
{
myCommand.ExecuteNonQuery();
//Message.InnerHtml = "Record Added
" + insertCmd;

}

catch
{
//Console.WriteLine("{0} Second exception caught.", e);

this.body.Text = "*************";

}

myCommand.Connection.Close();

}

连接SQL Server数据库

源代码:

//作用: 连接SQL Server数据库

//参数：ServerName 服务器名,DBName 数据库名,UserID 用户名，UserPwd 用户密码

public void ConnSQLServer(string ServerName, string DBName)

{

mCnnDB.ConnectionString = "uid=;pwd= ;driver={SQL Server};" +

"server=" +ServerName+

";database=" + DBName;

mCnnDB.Open(mCnnDB.ConnectionString,"sa","",-1);

}

public void ConnSQLServer(string ServerName, string DBName,string UserID,string UserPwd)

{ mCnnDB.ConnectionString = "uid='" + UserID + "';pwd='" + UserPwd + "' ;driver={SQL Server};" +

"server=" + ServerName +

";database=" + DBName;

mCnnDB.Open(mCnnDB.ConnectionString,UserID,UserPwd,-1);;

}

连接ODBC数据库

源代码:

// '作用: 连接ODBC数据库

// '参数：dsnName ODBC名,UserID 用户名，UserPwd 用户密码

public void ConnODBC(string dsnName )

{

mCnnDB.Provider = "MSDASQL";

mCnnDB.ConnectionString = "Data Source='" + dsnName + "'";

mCnnDB.Open(mCnnDB.ConnectionString,"","",-1);

}

public void ConnODBC(string dsnName,string UserID, string UserPwd )

{ mCnnDB.Provider = "MSDASQL";

mCnnDB.ConnectionString = "User ID='" +UserID + "';" +

"Password='" + UserPwd + "';" +

"Data Source='"+dsnName+ "'";

mCnnDB.Open(mCnnDB.ConnectionString,UserID,UserPwd,-1 );

}