c# - 将c#连接到SQL服务器的教程

Question

我希望能够使用 C# 编辑 SQL Server 数据库中的表。

谁能给我一个关于连接到数据库和编辑表中数据的非常简单的教程。

非常感谢。

Answer 1

第一步是创建连接。连接需要一个连接字符串。您可以使用 SqlConnectionStringBuilder 创建连接字符串。

SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
connBuilder.InitialCatalog = "DatabaseName";
connBuilder.DataSource = "ServerName";
connBuilder.IntegratedSecurity = true;

然后使用该连接字符串创建您的连接，如下所示:

SqlConnection conn = new SqlConnection(connBuilder.ToString());

//Use adapter to have all commands in one object and much more functionalities
SqlDataAdapter adapter = new SqlDataAdapter("Select ID, Name, Address from  myTable", conn);
adapter.InsertCommand.CommandText = "Insert into myTable (ID, Name, Address) values(1,'TJ', 'Iran')";
adapter.DeleteCommand.CommandText = "Delete From myTable Where (ID = 1)";
adapter.UpdateCommand.CommandText = "Update myTable Set Name = 'Dr TJ' Where (ID = 1)";

//DataSets are like arrays of tables
//fill your data in one of its tables 
DataSet ds = new DataSet();
adapter.Fill(ds, "myTable");  //executes Select command and fill the result into tbl variable

//use binding source to bind your controls to the dataset
BindingSource myTableBindingSource = new BindingSource();
myTableBindingSource.DataSource = ds;

然后，很简单，您可以在绑定(bind)源中使用 AddNew() 方法来添加新记录，然后使用适配器的更新方法保存它:

adapter.Update(ds, "myTable");

使用此命令删除一条记录:

myTableBindingSource.RemoveCurrent();
adapter.Update(ds, "myTable");

最好的方法是从 Project->Add New Item 菜单添加一个 DataSet 并按照向导...