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我正在使用C#與Mvvm Light和Mysql數據庫的應用程序。當我做一個插入到數據庫與對象是一個DateTime對象,我收到以下錯誤的參數:獲取「System.FormatException:輸入字符串的格式不正確。」在日期時間對象插入到MySql數據庫
System.FormatException: Input string was not in a correct format.
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.String.System.IConvertible.ToInt32(IFormatProvider provider)
at System.Convert.ToInt32(Object value)
at MySql.Data.Types.MySqlInt32.MySql.Data.Types.IMySqlValue.WriteValue(MySqlPacket packet, Boolean binary, Object val, Int32 length)
at MySql.Data.MySqlClient.MySqlParameter.Serialize(MySqlPacket packet, Boolean binary, MySqlConnectionStringBuilder settings)
at MySql.Data.MySqlClient.Statement.SerializeParameter(MySqlParameterCollection parameters, MySqlPacket packet, String parmName, Int32 parameterIndex)
at MySql.Data.MySqlClient.Statement.InternalBindParameters(String sql, MySqlParameterCollection parameters, MySqlPacket packet)
at MySql.Data.MySqlClient.Statement.BindParameters()
at MySql.Data.MySqlClient.PreparableStatement.Execute()
at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery()
下面是我的視圖模型的代碼(proj.ProjectStartDate是一個DateTime對象):
DateTime startDate = projectStartDateProperty?? DateTime.Now;
string startStr = startDate.ToString("d");
DateTime projStart = Convert.ToDateTime(startStr);
DateTime endDate = projectEndDateProperty ?? DateTime.Now;
string endStr = endDate.ToString("d");
DateTime projEnd = Convert.ToDateTime(endStr);
proj.ProjectName = _projName;
proj.ProjectStartDate = projStart;
proj.ProjectEndDate = projEnd;
proj.ProjectNotes = _projNotes;
ProjectDbInteraction.InsertProject(_projName, proj);
設置在proj.ProjectEndDate結果一個破發點是
而且下面是我對插入到MySQL數據庫的型號代碼:
string connStr = "server=*****;database=" + projName + ";user=*****;port=*****;password=*****;";
MySqlConnection conn = new MySqlConnection(connStr);
MySqlCommand cmd;
string queryInsertintoProjTable;
try
{
conn.Open();
cmd = new MySqlCommand("INSERT INTO " + projName +
".project(ProjectID,ProjectName,ProjectStartDate,ProjectEndDate,ProjectNotes) VALUES("
+ "(?projectid, ?projectnamecolumn,?projectstartdatecolumn,?projectenddatecolumn,?projectnotescolumn);", conn);
cmd.Parameters.AddWithValue("?projectid", MySqlDbType.Int32).Value = proj.ProjectID;
cmd.Parameters.AddWithValue("?projectnamecolumn", MySqlDbType.VarChar).Value = proj.ProjectName;
cmd.Parameters.AddWithValue("?projectstartdatecolumn", proj.ProjectStartDate.ToString("yyyy-MM-dd HH:mm:ss"));
cmd.Parameters.AddWithValue("?projectenddatecolumn", proj.ProjectEndDate.ToString("yyyy-MM-dd HH:mm:ss"));
cmd.Parameters.AddWithValue("?projectnotescolumn", MySqlDbType.VarChar).Value = proj.ProjectNotes;
cmd.ExecuteNonQuery();
conn.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
那麼,我需要做什麼來解決這個問題呢?這是我第一次使用MySql。
從這裏的MySQL文檔:http://dev.mysql.com/doc/refman/5.1/en/datetime.html,DateTime格式應該在'YYYY-MM-DD HH:MM:SS' – Saggio 2014-12-02 18:17:13
我很欣賞那個薩吉奧。 – yams 2014-12-02 18:23:04
但我確實有一個問題,我不能將字符串推入數據庫。如果我將它轉換回日期時間對象,它會將其轉換回UTC,所以如何在不發生這種情況的情況下將它重新插入數據庫? – yams 2014-12-02 18:26:07