我试图用数据集更新我的数据库表。我有一个本地excel文件，可以编辑并导入到数据集中。然后我想使用此数据集与更新的数据来更新我的数据库表。这是我的代码：
public void UpdateDatabase(DataSet data, string tableName)
{
string connectionString = ConfigurationManager.ConnectionStrings["TestDbOnBrie"].ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString))
{
try
{
connection.Open();
using (SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM dbo.TransportSchedule_Customer;", connection))
{
SqlCommand selectCmd = new SqlCommand("SELECT * FROM dbo.TransportSchedule_Customer", connection);
adapter.SelectCommand = selectCmd;
SqlCommand updateCmd = new SqlCommand("UPDATE dbo.TransportSchedule_Customer SET Alias=@Alias, DeliveryDays1=@DeliveryDays1, DeliveryHours1=@DeliveryHours1, DeliveryType1=@DeliveryType1, DeliveryDays2=@DeliveryDays2, DeliveryHours2=@DeliveryHours2, DeliveryType2=@DeliveryType2, DeliveryDays3=@DeliveryDays3, DeliveryHours3=@DeliveryHours3, DeliveryType3=@DeliveryType3, DistanceToDealer=@DistanceToDealer WHERE AdrID=@AdrID AND CustID=@CustID", connection);
SqlCommand insertCmd = new SqlCommand("INSERT INTO dbo.TransportSchedule_Customer (CustID, Alias, AdrID, DeliveryDays1, DeliveryHours1, DeliveryType1, DeliveryDays2, DeliveryHours2, DeliveryType2, DeliveryDays3, DeliveryHours3, DeliveryType3, DistanceToDealer)" +
"VALUES (@CustID, @Alias, @AdrID, @DeliveryDays1, @DeliveryHours1, @DeliveryType1, @DeliveryDays2, @DeliveryHours2, @DeliveryType2, @DeliveryDays3, @DeliveryHours3, @DeliveryType3, @DistanceToDealer)", connection);
//insertCmd.Parameters.Add("@CustID", SqlDbType.VarChar, 50, "CustID");
//insertCmd.Parameters.Add("@AdrID", SqlDbType.Int, 50, "AdrID");
//insertCmd.Parameters.Add("@Alias", SqlDbType.VarChar, 50, "Alias");
//insertCmd.Parameters.Add("@DeliveryDays1", SqlDbType.VarChar, 50, "DeliveryDays1");
//insertCmd.Parameters.Add("@DeliveryHours1", SqlDbType.VarChar, 50, "DeliveryHours1");
//insertCmd.Parameters.Add("@DeliveryType1", SqlDbType.VarChar, 50, "DeliveryType1");
//insertCmd.Parameters.Add("@DeliveryDays2", SqlDbType.VarChar, 50, "DeliveryDays2");
//insertCmd.Parameters.Add("@DeliveryHours2", SqlDbType.VarChar, 50, "DeliveryHours2");
//insertCmd.Parameters.Add("@DeliveryType2", SqlDbType.VarChar, 50, "DeliveryType2");
//insertCmd.Parameters.Add("@DeliveryDays3", SqlDbType.VarChar, 50, "DeliveryDays3");
//insertCmd.Parameters.Add("@DeliveryHours3", SqlDbType.VarChar, 50, "DeliveryHours3");
//insertCmd.Parameters.Add("@DeliveryType3", SqlDbType.VarChar, 50, "DeliveryType3");
//insertCmd.Parameters.Add("@DistanceToDealer", SqlDbType.VarChar, 50, "DistanceToDealer");
//adapter.InsertCommand = insertCmd;
updateCmd.Parameters.Add("@CustID", SqlDbType.VarChar, 50, "CustID");
updateCmd.Parameters.Add("@AdrID", SqlDbType.Int, 50, "AdrID");
updateCmd.Parameters.Add("@Alias", SqlDbType.VarChar, 50, "Alias");
updateCmd.Parameters.Add("@DeliveryDays1", SqlDbType.VarChar, 50, "DeliveryDays1");
updateCmd.Parameters.Add("@DeliveryHours1", SqlDbType.VarChar, 50, "DeliveryHours1");
updateCmd.Parameters.Add("@DeliveryType1", SqlDbType.VarChar, 50, "DeliveryType1");
updateCmd.Parameters.Add("@DeliveryDays2", SqlDbType.VarChar, 50, "DeliveryDays2");
updateCmd.Parameters.Add("@DeliveryHours2", SqlDbType.VarChar, 50, "DeliveryHours2");
updateCmd.Parameters.Add("@DeliveryType2", SqlDbType.VarChar, 50, "DeliveryType2");
updateCmd.Parameters.Add("@DeliveryDays3", SqlDbType.VarChar, 50, "DeliveryDays3");
updateCmd.Parameters.Add("@DeliveryHours3", SqlDbType.VarChar, 50, "DeliveryHours3");
updateCmd.Parameters.Add("@DeliveryType3", SqlDbType.VarChar, 50, "DeliveryType3");
updateCmd.Parameters.Add("@DistanceToDealer", SqlDbType.VarChar, 50, "DistanceToDealer");
adapter.UpdateCommand = updateCmd;
adapter.Update(data, "1");
}
}
catch (Exception exception)
{
Console.WriteLine("ERROR in UpdateDatabase() method. Error Message : " + exception.Message);
}
finally
{
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
}
}
}
}
我的问题是，当我只使用更新命令时，我收到此错误：
在使用新行传递DataRow集合时，更新需要有效的InsertCommand。
当我同时使用update命令和Insert命令时，我收到此错误：
违反PRIMARY KEY约束'PK_TransportSchedule_Customer'。无法在对象'dbo.TransportSchedule_Customer'中插入重复键。
我认为它认为数据集表行是新行并且必须插入，但实际上并非如此。行存在数据库，只有一些更新。
doe的任何人都有任何关于该做什么的想法？
答案 0 :(得分：0)
我自己发现了如何做到这一点。这是我的方法结果。这很完美。它只更新存在的行，并在数据集和数据集中包含数据集中的不同数据。
我的方法：
public void UpdateDatabase(DataSet data, string custID)
{
DataTable fromdatabase = new DataTable();
DataTable fromFile = data.Tables[0];
string connectionString = ConfigurationManager.ConnectionStrings["TestDbOnBrie"].ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString))
{
try
{
connection.Open();
string sqlCmd = "SELECT * FROM dbo.TransportSchedule_Customer WHERE CustID = '" + custID + "';";
SqlCommand command = new SqlCommand(sqlCmd, connection);
using (SqlCommand updateCmd = new SqlCommand("UPDATE dbo.TransportSchedule_Customer SET DeliveryDays1=@DeliveryDays1, DeliveryHours1=@DeliveryHours1, DeliveryType1=@DeliveryType1, DeliveryDays2=@DeliveryDays2, DeliveryHours2=@DeliveryHours2, DeliveryType2=@DeliveryType2, DeliveryDays3=@DeliveryDays3, DeliveryHours3=@DeliveryHours3, DeliveryType3=@DeliveryType3, DistanceToDealer=@DistanceToDealer WHERE Alias=@Alias AND CustID=@CustID", connection))
{
using (SqlDataAdapter adapter = new SqlDataAdapter(command))
{
adapter.UpdateCommand = updateCmd;
adapter.Fill(fromdatabase);
updateCmd.Parameters.Add("@CustID", SqlDbType.VarChar, 50, "CustID");
updateCmd.Parameters.Add("@Alias", SqlDbType.VarChar, 50, "Alias");
updateCmd.Parameters.Add("@DeliveryDays1", SqlDbType.VarChar, 50, "DeliveryDays1");
updateCmd.Parameters.Add("@DeliveryHours1", SqlDbType.VarChar, 50, "DeliveryHours1");
updateCmd.Parameters.Add("@DeliveryType1", SqlDbType.VarChar, 50, "DeliveryType1");
updateCmd.Parameters.Add("@DeliveryDays2", SqlDbType.VarChar, 50, "DeliveryDays2");
updateCmd.Parameters.Add("@DeliveryHours2", SqlDbType.VarChar, 50, "DeliveryHours2");
updateCmd.Parameters.Add("@DeliveryType2", SqlDbType.VarChar, 50, "DeliveryType2");
updateCmd.Parameters.Add("@DeliveryDays3", SqlDbType.VarChar, 50, "DeliveryDays3");
updateCmd.Parameters.Add("@DeliveryHours3", SqlDbType.VarChar, 50, "DeliveryHours3");
updateCmd.Parameters.Add("@DeliveryType3", SqlDbType.VarChar, 50, "DeliveryType3");
updateCmd.Parameters.Add("@DistanceToDealer", SqlDbType.VarChar, 50, "DistanceToDealer");
for (int i = 0; i < fromdatabase.Rows.Count; i++)
{
int Resultcompare = 0;
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryDays1"].ToString(), fromFile.Rows[i]["DeliveryDays1"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryHours1"].ToString(), fromFile.Rows[i]["DeliveryHours1"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryType1"].ToString(), fromFile.Rows[i]["DeliveryType1"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryDays2"].ToString(), fromFile.Rows[i]["DeliveryDays2"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryHours2"].ToString(), fromFile.Rows[i]["DeliveryHours2"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryType2"].ToString(), fromFile.Rows[i]["DeliveryType2"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryDays3"].ToString(), fromFile.Rows[i]["DeliveryDays3"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryHours3"].ToString(), fromFile.Rows[i]["DeliveryHours3"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DeliveryType3"].ToString(), fromFile.Rows[i]["DeliveryType3"].ToString());
Resultcompare += string.Compare(fromdatabase.Rows[i]["DistanceToDealer"].ToString(), fromFile.Rows[i]["DistanceToDealer"].ToString());
if (Resultcompare == 0)
{
//do nothing
}
else
{
fromdatabase.Rows[i]["DeliveryDays1"] = fromFile.Rows[i]["DeliveryDays1"];
fromdatabase.Rows[i]["DeliveryHours1"] = fromFile.Rows[i]["DeliveryHours1"];
fromdatabase.Rows[i]["DeliveryType1"] = fromFile.Rows[i]["DeliveryType1"];
fromdatabase.Rows[i]["DeliveryDays2"] = fromFile.Rows[i]["DeliveryDays2"];
fromdatabase.Rows[i]["DeliveryHours2"] = fromFile.Rows[i]["DeliveryHours2"];
fromdatabase.Rows[i]["DeliveryType2"] = fromFile.Rows[i]["DeliveryType2"];
fromdatabase.Rows[i]["DeliveryDays3"] = fromFile.Rows[i]["DeliveryDays3"];
fromdatabase.Rows[i]["DeliveryHours3"] = fromFile.Rows[i]["DeliveryHours3"];
fromdatabase.Rows[i]["DeliveryType3"] = fromFile.Rows[i]["DeliveryType3"];
fromdatabase.Rows[i]["DistanceToDealer"] = fromFile.Rows[i]["DistanceToDealer"];
adapter.Update(fromdatabase);
}
}
}
}
}
catch (Exception exception)
{
Console.WriteLine("ERROR in UpdateDatabase() method. Error Message : " + exception.Message);
}
finally
{
if (connection.State == System.Data.ConnectionState.Open)
{
connection.Close();
}
}
}
}
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