http://topic.csdn.net/u/20071119/17/9316fdc5-5993-4720-a8e7-0d4ab5e28528.html?上面的問題就是我碰到的我想操作的是利用SqlDataAdapter的幾個Command屬性(InsertCommand,UpdateCommand,DeleteCommand)來更新數據庫代碼:SqlConnection conn = new SqlConnection(@"Data Source=.\sqlexpress;Initial Catalog=newsystem;Integrated Security=True");? SqlDataAdapter da = new SqlDataAdapter("select * from comment", conn);??//這里的構造函數直接實例化了SelectCommand所需要的SqlCommand了吧?? DataSet ds = new DataSet("myds");? da.FillSchema(ds, SchemaType.Source, "comment");? da.Fill(ds, "comment");??//接下來設置InsertCommand所需要的SqlCommandSqlCommand incmd=new SqlCommand("insert into comment (****) values(****)",conn);? da.InsertCommand = incmd;??//接下來是更新到數據庫? da.Update(ds.Tables["comment"]);? ds.Tables["comment"].AcceptChanges();??可到數據庫里一看,悲劇發生了:沒有插入該條記錄!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!網上一查:有些說要實例化SqlCommandBuilder,可我覺得我的InsertCommand所需要的SqlCommand都寫好了,不需要這樣吧！SqlCommandBuilder好像只是適用于直接修改DataSet,由SqlCommandBuilder自動生成所需的SQL語句:? SqlConnection conn = new SqlConnection(@"Data Source=.\sqlexpress;Initial Catalog=newsystem;Integrated Security=True");? SqlDataAdapter da = new SqlDataAdapter("select * from comment", conn);? SqlCommandBuilder cmdb = new SqlCommandBuilder(da);? DataSet ds = new DataSet("myds");? da.FillSchema(ds, SchemaType.Source, "comment");? da.Fill(ds, "comment");? ds.Tables["comment"].Rows[5]["content"] = "Can you help me???";? da.Update(ds.Tables["comment"]);? ds.Tables["comment"].AcceptChanges();
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慕后森
TA貢獻1802條經驗 獲得超5個贊
public static SqlDataAdapter CreateCustomerAdapter( SqlConnection connection) { SqlDataAdapter adapter = new SqlDataAdapter(); // Create the SelectCommand. SqlCommand command = new SqlCommand("SELECT * FROM Customers " + "WHERE Country = @Country AND City = @City", connection); // Add the parameters for the SelectCommand. command.Parameters.Add("@Country", SqlDbType.NVarChar, 15); command.Parameters.Add("@City", SqlDbType.NVarChar, 15); adapter.SelectCommand = command; // Create the InsertCommand. command = new SqlCommand( "INSERT INTO Customers (CustomerID, CompanyName) " + "VALUES (@CustomerID, @CompanyName)", connection); // Add the parameters for the InsertCommand. command.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID"); command.Parameters.Add("@CompanyName", SqlDbType.NVarChar, 40, "CompanyName"); adapter.InsertCommand = command; // Create the UpdateCommand. command = new SqlCommand( "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " + "WHERE CustomerID = @oldCustomerID", connection); // Add the parameters for the UpdateCommand. command.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID"); command.Parameters.Add("@CompanyName", SqlDbType.NVarChar, 40, "CompanyName"); SqlParameter parameter = command.Parameters.Add( "@oldCustomerID", SqlDbType.NChar, 5, "CustomerID"); parameter.SourceVersion = DataRowVersion.Original; adapter.UpdateCommand = command; // Create the DeleteCommand. command = new SqlCommand( "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection); // Add the parameters for the DeleteCommand. parameter = command.Parameters.Add( "@CustomerID", SqlDbType.NChar, 5, "CustomerID"); parameter.SourceVersion = DataRowVersion.Original; adapter.DeleteCommand = command; return adapter; }
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