1
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace lab1
{
public partial class Form1 : Form
{
DataSet ds = new DataSet(); //holding place in memory
SqlDataAdapter daParent = new SqlDataAdapter();
SqlDataAdapter daChild = new SqlDataAdapter();
SqlConnection cs = new SqlConnection("Data Source=user-PC\\SQLEXPRESS; Initial Catalog=dede;Integrated Security=TRUE");
BindingSource ParentBS = new BindingSource();
BindingSource ChildBS = new BindingSource();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
SqlCommand slctParent = new SqlCommand("select * from Developerss", cs); //select statement
daParent.SelectCommand = slctParent; // attaching sql command into the select command property of the data adapter Parent
daParent.Fill(ds, "Developerss"); //fullfilling the data set, calling the table Parent
SqlCommand slctChild = new SqlCommand("select * from Games", cs);
daParent.SelectCommand = slctChild;
daParent.Fill(ds,"Games");
dgParent.DataSource = ds.Tables["Developerss"];
dgChild.DataSource = ds.Tables["Games"];
dgParent.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
dgChild.SelectionMode = DataGridViewSelectionMode.FullRowSelect;//click anywhere in the table we have the whole row selected
ParentBS.DataSource = ds.Tables[0];
ChildBS.DataSource = ds.Tables[1];
textId.DataBindings.Add(new Binding("Text",ChildBS,"game_id"));
textName.DataBindings.Add(new Binding("Text", ChildBS, "game_name"));
textPlatform.DataBindings.Add(new Binding("Text", ChildBS, "game_platform"));
textDeveloperId.DataBindings.Add(new Binding("Text", ParentBS, "d_id"));
}
private void dgParent_SelectionChanged(object sender, EventArgs e)
{
ds.Tables["Games"].DefaultView.RowFilter = "developer_id = " + dgParent.CurrentRow.Cells["d_id"].Value;
//whenever the selection change on the dgparent use the value of the current row that we're on
dgChild.DataSource = ds.Tables["Games"];
}
private void addBtn_Click(object sender, EventArgs e)
{
daChild.InsertCommand = new SqlCommand("insert into Games values @id, @name, @platform, @developerId", cs);
daChild.InsertCommand.Parameters.Add("@id", SqlDbType.Int).Value = textId.Text;
daChild.InsertCommand.Parameters.Add("@name", SqlDbType.VarChar).Value = textName.Text;
daChild.InsertCommand.Parameters.Add("@platform", SqlDbType.VarChar).Value = textPlatform.Text;
daChild.InsertCommand.Parameters.Add("@developerId", SqlDbType.Int).Value = ds.Tables[0].Rows[ParentBS.Position][0];
cs.Open();
daChild.InsertCommand.ExecuteNonQuery();
cs.Close();
}
我對insert
命令有問題。我收到以下錯誤:
'game_id'附近的語法不正確。
是列存在於數據庫中。我得到了同樣的錯誤爲我的更新功能,但我沒有貼在這裏,因爲我相信它必須來自相同的錯誤來源。我有2個數據網格,一個是父母,另一個是孩子。基本上我想在子表中添加新記錄。
預先感謝您!
看看實體框架。它可以爲你生成所有這些樣板代碼。 – turtlepick