C＃更新问题

Question

我得到了这个sqlException：

  

'，'附近的语法不正确。

newConnection.ConnectionM();
SqlCommand cmd = SqlConnectionOLTP.cn.CreateCommand();
cmd.CommandText = "Update Cost SET ActualAmount=@actualamount,FlagAdjustment=@flag, Date=@date where ProjectID=@projectid, PropertyID=@propertyid, CostCategoryID=@costcategoryid";
cmd.Parameters.AddWithValue("@actualamount", textBoxAmount.Text);
cmd.Parameters.AddWithValue("@flag", flag);
cmd.Parameters.AddWithValue("@date", dateTimePickerDate.Text);
cmd.Parameters.AddWithValue("@projectid", ProjectID);
cmd.Parameters.AddWithValue("@propertyid", PropertyID);
cmd.Parameters.AddWithValue("@costcategoryid", CostCatID);
cmd.ExecuteNonQuery();
SqlConnectionOLTP.cn.Close();
MessageBox.Show("Saved", "Save", MessageBoxButtons.OK, MessageBoxIcon.None);

Answer 1

条件应使用和或 OR 或您要应用的条件分隔的逗号。

我使用和条件，如下所示：

 newConnection.ConnectionM();
                SqlCommand cmd = SqlConnectionOLTP.cn.CreateCommand();
                cmd.CommandText = "Update Cost SET ActualAmount=@actualamount,FlagAdjustment=@flag, Date=@date where ProjectID=@projectid and PropertyID=@propertyid and CostCategoryID=@costcategoryid";
                cmd.Parameters.AddWithValue("@actualamount", textBoxAmount.Text);

Answer 2

我认为你应该写出正确的语法

cmd.CommandText = "Update Cost SET ActualAmount=@actualamount,FlagAdjustment=@flag, Date=@date where ProjectID=@projectid and PropertyID=@propertyid and CostCategoryID=@costcategoryid";

我希望它对你有用