SqlDataAdapter和SqlCommandBuilder删除数据
2012-03-07 11:47
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using System; using System.Data; using System.Data.SqlClient; //SqlDataAdapter网站:http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldataadapter.aspx //SqlCommandBuilder网站:http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommandbuilder.aspx namespace Chapter13 { class PersistDels { static void Main(string[] args) { // connection string string connString = @" server = .; integrated security = true; database = northwind "; // query string qry = @" select * from employees where country = 'UK' "; // Create connection SqlConnection conn = new SqlConnection(connString); try { // create data adapter SqlDataAdapter da = new SqlDataAdapter(); da.SelectCommand = new SqlCommand(qry, conn); SqlCommandBuilder sqlCmdBder = new SqlCommandBuilder(da); // create and fill dataset DataSet ds = new DataSet(); da.Fill(ds, "employees"); // get data table reference DataTable dt = ds.Tables["employees"]; // display rows foreach (DataRow row in dt.Rows) { Console.WriteLine( "{0} {1} {2}", row["firstname"].ToString().PadRight(15), row["lastname"].ToString().PadLeft(25), row["city"]); } string filt = @" firstname = 'Roy' and lastname = 'Beatty' "; // // delete employees foreach (DataRow row in dt.Select(filt)) { row.Delete(); } //很重要的一步,把本地修改提交至至数据库。 da.Update(ds, "employees"); } catch (Exception e) { Console.WriteLine("Error: " + e); } finally { // close connection conn.Close(); } } } }
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