您好我正在创建sqlconnectivity类，当我在datagridview中编辑完数据集后尝试更新整个数据集时，我遇到了一个问题。可以请任何人提出为什么我似乎无法更新我的数据集。这是我用于获取数据集和更新数据集的类代码。
public class clssql
{
#region private sqlvariabels
private static string _sqlconnectionstring;
private SqlDataAdapter _sqldataadapter;
private SqlCommand _sqlcommand;
private SqlConnection _sqlconnection;
private SqlCommandBuilder _sqlcommandbuilder;
private SqlTransaction _sqlTransaction;
private DataSet _ds;
private bool _Transctionbinded=false;
private string _errorstring;
#endregion
/// <summary>
/// Constructor for clssql
/// </summary>
public clssql()
{
_sqlconnectionstring = GenerateSQLConnectionString(false);
_sqlconnection = new SQLConnection(_sqlconnectionstring);
}
/// <summary>
/// BindsTransaction to the Object
/// </summary>
public void BindTransaction()
{
_Transctionbinded = true;
_sqlconnection.Open();
_sqlTransaction = _sqlconnection.BeginTransaction();
_sqlcommand.Transaction = _sqlTransaction;
}
/// <summary>
/// Releases the transaction
/// </summary>
public void ReleaseTransaction()
{
if (_errorstring=="")
{
_Transctionbinded = false;
_sqlTransaction.Commit();
_sqlconnection.Close();
}
else
{
}
_sqlTransaction = null;
}
/// <summary>
/// Generate sqlconnection string.
/// </summary>
/// <param name="hardcoded">set to true if you want hardcoded string and not from app.config generated</param>
/// <returns></returns>
public static string GenerateSQLConnectionString(bool hardcoded = false)
{
StringBuilder connstring = new StringBuilder();
if (hardcoded)
{
return @"Data Source=MAYA-PC\SQLExpress;Initial Catalog=BankDB;Persist Security Info=True;User ID=sa;Password=sql123";
}
else
{
try
{
connstring.Append("Data Source=" + ConfigurationManager.AppSettings["DataSource"] + ";");
connstring.Append("Initial Catalog=" + ConfigurationManager.AppSettings["InitialCatalog"] + ";");
connstring.Append("Persist Security Info=True;");
connstring.Append("User ID=" + ConfigurationManager.AppSettings["UserID"] + ";");
connstring.Append("Password=" + ConfigurationManager.AppSettings["Password"] + ";");
return connstring.ToString();
}
catch (Exception)
{
throw;
}
}
}
/// <summary>
/// Executes an SQL Command Text.
/// </summary>
/// <param name="Query">Query to execute</param>
/// <returns>Returns the Number of Rows Affected</returns>
public int ExecuteNonQuery(string Query)
{
try
{
int rec;
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Open();
}
//_sqlconnection = new SqlConnection(_sqlconnectionstring);
_sqlcommand.CommandText = Query;
_sqlcommand.CommandType = CommandType.Text;
rec = _sqlcommand.ExecuteNonQuery();
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Close();
}
return rec;
}
catch (Exception ex)
{
if (_Transctionbinded)
{
_errorstring = ex.Message;
}
else
{
_sqlconnection.Close();
}
throw;
}
}
/// <summary>
/// Directly Executes an SQL Command
/// </summary>
/// <param name="_sqlcommand"></param>
/// <returns></returns>
public int ExecuteCommand(SqlCommand _sqlcommand)
{
try
{
int rec;
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Open();
}
_sqlcommand.Connection = _sqlconnection;
rec =_sqlcommand.ExecuteNonQuery();
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Close();
}
return rec;
}
catch (Exception ex)
{
if (_Transctionbinded)
{
_errorstring = ex.Message;
}
else
{
_sqlconnection.Close();
}
throw;
}
}
/// <summary>
/// Get Dataset From Query
/// </summary>
/// <param name="SelectQuery"></param>
/// <returns></returns>
public DataSet GetDataset(string SelectQuery)
{
try
{
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection = new SqlConnection(_sqlconnectionstring);
_sqlconnection.Open();
}
_sqlcommand = new SqlCommand(SelectQuery, _sqlconnection);
_sqldataadapter = new SqlDataAdapter(_sqlcommand);
_sqlcommandbuilder = new SqlCommandBuilder(_sqldataadapter);
_ds = new DataSet();
_sqldataadapter.Fill(_ds);
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Close();
}
return _ds;
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// Updates Dataset
/// </summary>
/// <param name="ds"></param>
/// <returns></returns>
public int UpdateDataset(DataSet ds)
{
int rec;
try
{
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Open();
}
if (ds.HasChanges()) {
ds.AcceptChanges();
}
_sqldataadapter.UpdateCommand = _sqlcommandbuilder.GetUpdateCommand(true);
_sqldataadapter.InsertCommand = _sqlcommandbuilder.GetInsertCommand(true);
_sqldataadapter.DeleteCommand = _sqlcommandbuilder.GetDeleteCommand(true);
rec = _sqldataadapter.Update(ds);
if (_Transctionbinded)
{
//Do Nothing
}
else
{
_sqlconnection.Close();
}
return rec;
}
catch (Exception ex)
{
if (_Transctionbinded)
{
_errorstring = ex.Message;
}
else
{
_sqlconnection.Close();
}
throw;
}
}
}
我把全班推到了这里但是getdataset和更新数据集是唯一一个现在不需要转换的数据集，仅用于未来的参考。
在我尝试此代码的同一个项目中，编辑数据网格后，数据集已正确更新。我试过但尝试但不明白为什么它适用于下面的代码并且不能在上面的代码上工作..
private void LoadClick(object sender, EventArgs e)
{
string connectionString = @"Data Source=MAYA-PC\SQLExpress;Initial Catalog=CrystalTutorial;Persist Security Info=True;User ID=sa;Password=sql123";
string sql = "Select * From Customer_Orders";
SqlConnection connection = new SqlConnection(connectionString);
connection.Open();
sCommand = new SqlCommand(sql, connection);
sAdapter = new SqlDataAdapter(sCommand);
sBuilder = new SqlCommandBuilder(sAdapter);
sDs = new DataSet();
sAdapter.Fill(sDs, "Stores");
sTable = sDs.Tables["Stores"];
connection.Close();
dataGridView1.DataSource = sDs.Tables["Stores"];
dataGridView1.ReadOnly = true;
btnsave.Enabled = false;
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
}
private void new_btn_Click(object sender, EventArgs e)
{
dataGridView1.ReadOnly = false;
btnsave.Enabled = true;
btnnew.Enabled = false;
btndelete.Enabled = false;
}
private void delete_btn_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Do you want to delete this row ?", "Delete", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
dataGridView1.Rows.RemoveAt(dataGridView1.SelectedRows[0].Index);
sAdapter.Update(sTable);
}
}
private void save_btn_Click(object sender, EventArgs e)
{
sAdapter.Update(sTable);
dataGridView1.ReadOnly = true;
btnsave.Enabled = false;
btnnew.Enabled = true;
btndelete.Enabled = true;
}
答案 0 :(得分：1)
您不应在更新之前调用AcceptChanges方法。您可以在Order of using AcceptChanges and TableAdapter.Update主题中找到对此的解释。