當我嘗試執行以下參數化查詢:
INSERT INTO days (day,short,name,depcode,studycode,batchnum) values (?,?,?,?,?,?);SELECT SCOPE_IDENTITY();
通過command.ExecuteScalar();
引發以下例外:
錯誤[07001] [Informix .NET提供程序]錯誤的參數數量。
問題出在哪裏?
編輯:
public static int InsertDays(List<Day> days)
{
int affectedRow = -1;
Dictionary<string, string> daysParameter = new Dictionary<string, string>();
try
{
foreach (Day a in days)
{
daysParameter.Add("day", a.DayId.ToString());
daysParameter.Add("short", a.ShortName);
daysParameter.Add("name", a.Name);
daysParameter.Add("depcode", a.DepCode.ToString());
daysParameter.Add("studycode", a.StudyCode.ToString());
daysParameter.Add("batchnum", a.BatchNum.ToString());
affectedRow = DBUtilities.InsertEntity_Return_ID("days", daysParameter);
daysParameter.Clear();
if (affectedRow < 0)
{
break;
}
}
}
catch (Exception ee)
{
string message = ee.Message;
}
return affectedRow;
}
public static int InsertEntity_Return_ID(string tblName, Dictionary<string, string> dtParams)
{
int Result = -1;
DBConnectionForInformix DAL_Helper = new DBConnectionForInformix("");
string[] field_names = new string[dtParams.Count];
dtParams.Keys.CopyTo(field_names, 0);
string[] field_values = new string[dtParams.Count];
string[] field_valuesParam = new string[dtParams.Count];
dtParams.Values.CopyTo(field_values, 0);
for (int i = 0; i < field_names.Length; i++)
{
field_valuesParam[i] = "?";
}
string insertCmd = @"INSERT INTO " + tblName + " (" + string.Join(",", field_names) + ") values (" + string.Join(",", field_valuesParam) + ");SELECT SCOPE_IDENTITY();";
Result = int.Parse(DAL_Helper.Return_Scalar(insertCmd));
return Result;
}
應該是不'command.ExecuteNonQuery'? –
@Eben:我懷疑它的的ExecuteScalar由於「SELECT SCOPE_IDENTITY」的一部分。 –
以及您在哪裏添加了參數值?你應該添加一些行來增加'command.Parameters' ... –