本文主要介绍一些简单的Tkinter的示例,比如文本框定义、标签定义和TreeView定义等。...label='Menu 1', menu=submenu) menubar.add_command(label='Quit', command=root.destroy) # 创建文本框,只能用字符数设置文本框的宽度...
使用数据库连接对象创建一个命令对象(如SqlCommand、MySqlCommand),将删除语句和连接对象关联起来。然后调用命令对象的ExecuteNonQuery方法来执行删除操作。 最后,关闭数据库连接,释放资源。 以下是一个示例代码(使用C#和SQL Server): 代码语言:csharp 复制 // 获取选中的行数据 foreach (DataGridViewRow row in ...
1publicstaticOracleDataReader ExecuteReader(stringconnectionString,stringstrsql)2{3OracleConnection conn =newOracleConnection(connectionString);4conn.Open();5OracleCommand cmd =newOracleCommand(strsql, conn);6try7{8//CommandBehavior是一个枚举类型9OracleDataReader rdr =cmd.ExecuteReader(CommandBehavior.Close...
获取或设置一个值,该值指示 InsertCommand 属性中的文本是 SQL 语句还是存储过程的名称。 C# 复制 public System.Web.UI.WebControls.SqlDataSourceCommandType InsertCommandType { get; set; } 属性值 SqlDataSourceCommandType SqlDataSourceCommandType 值之一。 值为 Text 值。 例外 ArgumentOutOfRangeException...
publicclassDataRetriever:IDataPageRetriever{privatestringtableName;privateSqlCommand command;publicDataRetriever(stringconnectionString,stringtableName){ SqlConnection connection =newSqlConnection(connectionString); connection.Open(); command = connection.CreateCommand();this.tableName = tableName; }privateintrowCo...
publicclassDataRetriever:IDataPageRetriever{privatestringtableName;privateSqlCommand command;publicDataRetriever(stringconnectionString,stringtableName){ SqlConnection connection =newSqlConnection(connectionString); connection.Open(); command = connection.CreateCommand();this.tableName = tableName;...
{ private string tableName; private SqlCommand command; public DataRetriever(string connectionString, string tableName) { SqlConnection connection = new SqlConnection(connectionString); connection.Open(); command = connection.CreateCommand(); this.tableName = tableName; } private int rowCountValue = ...
Remarks SQL views are created with CREATE SQL VIEW. See Also Reference CREATE SQL VIEW Command OPEN DATABASE Command Other Resources Commands (Visual FoxPro)
DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> private void OnRecordDeleting(Object source, SqlDataSourceCommandEventArgs e) { // Cancel the delete operation if the checkbox is n...
"/northwind.db";//如果数据库不存在,则自动创建.mConn =newSQLiteConnection("Data Source="+mDbPath);//打开数据库文件.mConn.Open();//创建表[Test Table].//id - Unique Counter - Key Field (Required in any table)//FirstName - Text//Age - Integerusing(SQLiteCommand mCmd =newSQLiteCommand...