私はこの手順を持っています：
CREATE PROCEDURE UpdateVolunteers
@Vol_ID INT,
@Vol_Name NVARCHAR(50),
@Vol_Zone NVARCHAR(50),
@vol_street NVARCHAR(50),
@Vol_Sex INT,
@Vol_Date_of_Birth DATE,
@Vol_Home_Phone INT,
@Vol_Work_Phone INT,
@Vol_Mobile1 INT,
@Vol_Mobile2 INT,
@Vol_Email NVARCHAR(50),
@Vol_Job NVARCHAR(50),
@Vol_Affiliation NVARCHAR(50),
@vol_Education INT,
@vol_Education_Place NVARCHAR(50),
@vol_Education_Department NVARCHAR(50),
@vol_Interesting INT,
@Team_ID INT,
@vol_Notes NVARCHAR(50)
AS
IF @team_id = -1
BEGIN
SET @team_id = NULL
END
UPDATE Personal_Info
SET Vol_Name = @Vol_Name,
Vol_Zone = @Vol_Zone,
vol_street = @vol_street,
Vol_Sex = @Vol_Sex,
Vol_Date_of_Birth = @Vol_Date_of_Birth,
Vol_Home_Phone = @Vol_Home_Phone,
Vol_Work_Phone = @Vol_Work_Phone,
Vol_Mobile1 = @Vol_Mobile1,
Vol_Mobile2 = @Vol_Mobile2,
Vol_Email = @Vol_Email,
Vol_Job = @Vol_Job,
Vol_Affiliation = @Vol_Affiliation,
vol_Education = @vol_Education,
vol_Education_Place = @vol_Education_Place,
vol_Education_Department = @vol_Education_Department,
vol_Interesting = @vol_Interesting,
Team_ID = @Team_ID,
vol_Notes = @vol_Notes
WHERE Vol_ID = @Vol_ID
そして、次のコードで C# アプリケーションに呼び出しました。
private static void UpdateVolunteer(string volID, string volName, string volZone,
string volStreet, int volSex, DateTime volBirthday, int volHomePhone,
int volWorkPhone, int volMobile1, int volMobile2, string volEmail,
string volJob, string volAffiliation, int volEducation,
string volEducationPlace, string volEducationDepartment, int volInteresting,
int Team_ID, string volNotes)
{
try
{
SqlCommand com = new SqlCommand("UpdateVolunteers", con);
com.Parameters.Add("@Vol_ID", SqlDbType.Int).Value = volID;
com.Parameters.Add("@Vol_Name", SqlDbType.NVarChar, 50).Value = volName;
com.Parameters.Add("@Vol_Zone", SqlDbType.NVarChar, 50).Value = volZone;
com.Parameters.Add("@vol_street", SqlDbType.NVarChar, 50).Value = volStreet;
com.Parameters.Add("@Vol_Sex", SqlDbType.Int).Value = volSex;
com.Parameters.Add("@Vol_Date_of_Birth", SqlDbType.DateTime).Value = volBirthday;
com.Parameters.Add("@Vol_Home_Phone", SqlDbType.Int).Value = volHomePhone;
com.Parameters.Add("@Vol_Work_Phone", SqlDbType.Int).Value = volWorkPhone;
com.Parameters.Add("@Vol_Mobile1", SqlDbType.Int).Value = volMobile1;
com.Parameters.Add("@Vol_Mobile2", SqlDbType.Int).Value = volMobile2;
com.Parameters.Add("@Vol_Email", SqlDbType.NVarChar, 50).Value = volEmail;
com.Parameters.Add("@Vol_Job", SqlDbType.NVarChar, 50).Value = volJob;
com.Parameters.Add("@Vol_Affiliation", SqlDbType.NVarChar, 50).Value = volAffiliation;
com.Parameters.Add("@vol_Education", SqlDbType.Int).Value = volEducation;
com.Parameters.Add("@vol_Education_Place", SqlDbType.NVarChar, 50).Value = volEducationPlace;
com.Parameters.Add("@vol_Education_Department", SqlDbType.NVarChar, 50).Value = volEducationDepartment;
com.Parameters.Add("@vol_Interesting", SqlDbType.Int).Value = volInteresting;
com.Parameters.Add("@vol_Notes", SqlDbType.NVarChar, 50).Value = volNotes;
com.Parameters.Add("@Team_ID", SqlDbType.Int);
com.Parameters["@Team_ID"].Value = Team_ID;
com.CommandType = System.Data.CommandType.StoredProcedure;
if (con.State != ConnectionState.Open)
con.Open();
com.ExecuteNonQuery();
con.Close();
}
catch (SqlException sqlEx)
{
if (con.State == ConnectionState.Open)
con.Close();
throw sqlEx;
}
}
そして、C# のこの関数: Button_Click イベントで呼び出されます
public void showVolunteers(int x)
{
SqlCommand com = new SqlCommand("SELECT [Vol_ID]
,[Vol_Name]
,[Vol_Zone]
,[vol_street]
,[Vol_Sex]
,[vol_Age]
,[Vol_Date_of_Birth]
,[Vol_Home_Phone]
,[Vol_Work_Phone]
,[Vol_Mobile1]
,[Vol_Mobile2]
,[Vol_Email]
,[Vol_Job]
,[Vol_Affiliation]
,[vol_Education]
,[vol_Education_Place]
,[vol_Education_Department]
,[vol_Interesting]
,[vol_Hours]
,[vol_Notes]
,[Team_ID]
FROM [VolunteersAffairs].[dbo].[Personal_Info]", con);
SqlDataAdapter da = new SqlDataAdapter();
DataSet dats = new DataSet();
da.SelectCommand = com;
da.Fill(dats, "Personal_Info");
dataGridViewX1.DataSource = dats.Tables["Personal_Info"];
dataGridViewX1.Columns[2].DefaultCellStyle.NullValue = "Nothing";
updateComboBox.SelectedIndex = updateComboBox.Items.Count - 1;
if (x != -1)
{
dataGridViewX1.Rows[x].Selected = true;
dataGridViewX1.CurrentCell = dataGridViewX1[0, x];
}
labelItem1.Text = "Number of Volunteers = " + dataGridViewX1.Rows.Count;
int X = 0, Y = 0;
foreach (DataGridViewRow n in dataGridViewX1.Rows)
{
if (n.Cells[5].Value.ToString() == "Male")
X++;
else
Y++;
}
labelItem2.Text = " | Number of Males = " + X + " |Number of Female = " + Y;
//When I put the following as a comment the update is so fast, else very slowly.
//This operation takes the birthday of volunteers and calculate the age for every one.
//And calculate the age in runTime and the value of the column in database is null and always be.
#region the problem has been detected here
DateTime brithday;
for (int i = 0; i < dataGridViewX1.Rows.Count; i++)
{
brithday = (DateTime)dataGridViewX1[6, i].Value;
TimeSpan age = DateTime.Today - brithday;
dataGridViewX1[7, i].Value = age.Days / 365;
}
#endregion
}
問題は、C# の形式でテーブルを更新するとコードの実行に非常に長い (約 1 分) かかることですが、SQL クエリのコードを介して更新すると非常に高速です。問題は C# のコードにありますか、それとも呼び出されたプロシージャにありますか? この問題の解決策を教えてください。お願いします！！