C# C向DataGridView插入和更新内容无效！

我在这里遇到了一个非常麻烦的问题，这个查询看起来似乎是正确的，但它没有返回任何数据行

基本上，问题是在插入之后，我做了一个选择，以获得一个使用C的变量的自动递增数字NAlbum，下面是一段困扰我的代码

            //Associar ID de Artista
            ClassBD.DBMyReader(
                "SELECT NArtista " +
                "FROM Artistas " +
                "WHERE (Nome = '" + CBBoxAddArtista.Text + "')");
            ClassBD.myReader.Read();
            temptabelas[0] = ClassBD.myReader.GetInt32(0);

            //Associar ID da Editora
            ClassBD.DBMyReader(
                "SELECT NEditora " +
                "FROM Editora " +
                "WHERE (Nome = '" + CBBoxAddEditora.Text + "')");
            ClassBD.myReader.Read();
            temptabelas[1] = ClassBD.myReader.GetInt32(0);

            //Associar ID da Media
            ClassBD.DBMyReader(
                "SELECT NMedia " +
                "FROM Media " +
                "WHERE (Nome = '" + CBBoxAddMedia.Text + "')");
            ClassBD.myReader.Read();
            temptabelas[2] = ClassBD.myReader.GetInt32(0);

            //Associar ID do Genero
            ClassBD.DBMyReader(
                "SELECT NGenero " +
                "FROM Genero_de_Musica " +
                "WHERE (Nome = '" + CBBoxAddGenero.Text + "')");
            ClassBD.myReader.Read();
            temptabelas[3] = ClassBD.myReader.GetInt32(0);

提前感谢,，

---

路易斯·达科斯塔名列第一。您需要参数化查询以获得更清晰的语法

例如：

string CommandText = "select NArista from Artista where Nome=@Nome";
cmd = new SqlCommand(CommandText);
cmd.Connection = con;
cmd.Parameters.AddWithValue("@Nome",CBBoxAddArtista.Text);  
rdr = cmd.ExecuteReader();  
while(rdr.Read())
{
 temptabelas[0] = rdr["NAtista"].ToString()                      
}

foreach (DataGridViewRow dr in Datagridview1.Rows)
{
//Do your Code
"INSERT INTO Albuns " +
 "(NArtista, NEditora, NGeneroDeMusica, NMedia, Nome, [Ano de Edição])" +
"VALUES (@1,@2,@3,@4,@5,@6)";
// Add parameter
cmd.Parameters.AddWithValue("@1",(string) dr.Cells["Natista"].Value.ToString()); 
.
.
.
.
cmd.Parameters.AddWithValue("@6",int.Parse(TxtAddAnoEdicao.Text)


cmd.ExecuteNonQuery();

 }

将结果加载到数据gridview后，循环所有值 然后使用insert语句

例如：

string CommandText = "select NArista from Artista where Nome=@Nome";
cmd = new SqlCommand(CommandText);
cmd.Connection = con;
cmd.Parameters.AddWithValue("@Nome",CBBoxAddArtista.Text);  
rdr = cmd.ExecuteReader();  
while(rdr.Read())
{
 temptabelas[0] = rdr["NAtista"].ToString()                      
}

foreach (DataGridViewRow dr in Datagridview1.Rows)
{
//Do your Code
"INSERT INTO Albuns " +
 "(NArtista, NEditora, NGeneroDeMusica, NMedia, Nome, [Ano de Edição])" +
"VALUES (@1,@2,@3,@4,@5,@6)";
// Add parameter
cmd.Parameters.AddWithValue("@1",(string) dr.Cells["Natista"].Value.ToString()); 
.
.
.
.
cmd.Parameters.AddWithValue("@6",int.Parse(TxtAddAnoEdicao.Text)


cmd.ExecuteNonQuery();

 }

大家好,

ClassBD.DBMyInsertCommand("INSERT INTO Albuns " +
                "(NArtista, NEditora, NGeneroDeMusica, NMedia, Nome, [Ano de Edição]) " +
                "VALUES (" + temptabelas[0] + "," + temptabelas[1] + "," + temptabelas[2] + "," + temptabelas[3] + ",'" + TxtAddMusicaAlbum.Text + "'," + int.Parse(TxtAddAnoEdicao.Text) + ")");

            OleDbConnection connection = new OleDbConnection(ClassBD.MyConnectionString);
            connection.Open();
            OleDbCommand MyCommand = new OleDbCommand("SELECT NAlbum FROM Albuns WHERE (Nome = @Nome)", connection);
            MyCommand.Parameters.AddWithValue("@Nome", TxtAddMusicaAlbum.Text);
            OleDbDataReader myReader = MyCommand.ExecuteReader(CommandBehavior.CloseConnection);
            ClassBD.tempnalbum = myReader.GetInt32 ;

嗨，我昨天问了这个问题，你让我参数化查询，所以我做了。。。但是，它仍然没有出现行。。。帮助

---

插入是正确的，我已经检查了它的条目

使用参数化查询。您有5个选择，一个插入没有返回任何数据行？您好，1使用参数化查询？-请详细说明一下，我对SQL不是很熟悉…：s2不返回任何数据行的是：ClassBD.dbmyreaders从Albuns中选择MAXNAlbum作为Actual+；您有一个insert命令，但您甚至没有使用execute nonquery执行它。commandINSERT command.ExecuteOnQuery；

Private Sub BoundLoadButton_Click(ByVal sender As System.Object, 
                                  ByVal e As System.EventArgs) 
                                  Handles BoundLoadButton.Click
     swatch.Reset()
     swatch.Start()
     Cursor = Cursors.WaitCursor
     Try
        Using BoundObject As New UnboundClass(mMySQLConnectionString)
           Call BoundObject.BoundDataLoading(UnboundDataGridView, _
                                             RecordCountTextBox, _
                                             mErrorMsgString)
           If Not IsNothing(mErrorMsgString) Then
              Cursor = Cursors.Default
              MessageBox.Show(mErrorMsgString, _
                              Me.Text, _
                              MessageBoxButtons.OK, _
                              MessageBoxIcon.Error)
           End If
        End Using
     Catch exError As Exception
        MessageBox.Show(exError.Message, _
                        Me.Text, _
                        MessageBoxButtons.OK, _
                        MessageBoxIcon.Error)
     End Try
     Cursor = Cursors.Default
     swatch.Stop()
     mTimeDouble = swatch.ElapsedMilliseconds * 0.001
     BoundTimeTextBox.Text = mTimeDouble.ToString
End Sub