Question

设置nls_date_format：MM / DD / YY

设置DateTimePicker的格式：DateTimePickerFormat.Custom

据我所知，日期格式仅用于显示日期信息，不会影响它在数据库中的存储。

但是，我无法使用以下查询语句将日期插入表中

query = "INSERT INTO tuser (objectID, userID, userName, password, birthday) values (urObjID.nextval,'" + txtUserID.Text.Trim() + "','" + txtUserName.Text.Trim() + "','" + txtPassword.Text.Trim + "','" + dtpBirthday.Value + "')" 'Insert directly Date value from DateTimePicker

和

query = "INSERT INTO tuser (objectID, userID, userName, password, birthday) values (urObjID.nextval,'" + txtUserID.Text.Trim() + "','" + txtUserName.Text.Trim() + "','" + txtPassword.Text.Trim + "','" + dtpBirthday.Value.ToString("dd/MM/yyyy") + "')" 'Insert string value with format dd/MM/yyyy

但是可以使用以下查询将日期插入表格

query = "INSERT INTO tuser (objectID, userID, userName, password, birthday) values (urObjID.nextval,'" + txtUserID.Text.Trim() + "','" + txtUserName.Text.Trim() + "','" + txtPassword.Text.Trim + "','" + dtpBirthday.Value.ToString("dd-MMM-yyyy") + "')" 'Insert string value with format dd-MMM-yyyy

和

query = "INSERT INTO tuser (objectID, userID, userName, password, birthday) values (urObjID.nextval,'" + txtUserID.Text.Trim() + "','" + txtUserName.Text.Trim() + "','" + txtPassword.Text.Trim + "',TO_DATE('" + dtpBirthday.Value.ToString("dd-MMM-yy") + "'))" 'Insert date value using TO_DATE function

上述语句之间是否有任何差异使查询有效？

Answer 1

您不应使用任何语句，使用参数和绑定变量。

query = "INSERT INTO tuser (objectID, userID, userName, password, birthday) values (urObjID.nextval, :userID, :userName, :password, :birthday)" 

cmd.CommandText = query 
cmd.Parameters.Add("userID", OracleDbType.Varchar2, ParameterDirection.Input).Value = txtUserID.Text.Trim()
cmd.Parameters.Add("userName", OracleDbType.Varchar2, ParameterDirection.Input).Value = txtUserName.Text.Trim()
cmd.Parameters.Add("password", OracleDbType.Varchar2, ParameterDirection.Input).Value = txtPassword.Text.Trim
cmd.Parameters.Add("birthday", OracleDbType.Date, ParameterDirection.Input).Value = dtpBirthday.Value

使用DateTimePicker值插入oracle表

1 个答案: