我在 ASP.NET 中有一个表单，如果用户存在数据，它会加载数据，然后允许他们更新。所以在Page_Load我有：
protected void Page_Load(object sender, EventArgs e)
{
if (!CheckAndAddRecord(_currentUser.UserID))
{
CreateEntryPoint(_currentUser.UserID);
}
else
{
DataView dv = LoadApplicationData(_currentUser.UserID);
foreach (DataRowView rowView in dv)
{
DataRow row = rowView.Row;
_applicationId = row["id"].ToString();
txtProjectNumber.Text = row["ProjectNumber"].ToString();
if (String.IsNullOrEmpty(chkSignedNDANo.ToString()) || String.IsNullOrEmpty(chkSignedNDAYes.ToString()))
{
chkSignedNDANo.Checked = Convert.ToBoolean(row["SignedNDAOnFile"]);
chkSignedNDAYes.Checked = Convert.ToBoolean(row["SignedNDAOnFile"]);
}
txtDateWritten.Text = row["DateWritten"].ToString();
}
}
}
它调用这个方法：
public bool CheckAndAddRecord(int UserId)
{
string connStr = ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString;
SqlConnection conn = new SqlConnection(connStr);
SqlCommand cmd = new SqlCommand("CheckUserInTemp", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@SubmittedBy", UserId));
SqlDataAdapter dap = new System.Data.SqlClient.SqlDataAdapter(cmd);
DataSet ds = new DataSet();
// open conn
if (conn.State == ConnectionState.Closed)
conn.Open();
// fill
dap.Fill(ds);
// close the conn
if (conn.State == ConnectionState.Open)
conn.Close();
bool boolRecordExist = false;
if (ds.Tables[0].DefaultView.Count == 0)
{
boolRecordExist = false;
}
else
{
boolRecordExist = true;
}
return boolRecordExist;
}
这似乎可以正常工作并正确填充字段。但后来更新我调用了一个按钮点击，它调用了这个方法：
public void UpdateRecordInTemp(int appId, string projectNumber)
{
string connStr = ConfigurationManager.ConnectionStrings["SiteSqlServer"].ConnectionString;
SqlConnection conn = new SqlConnection(connStr);
SqlCommand cmd = new SqlCommand("CPC_ProposalUpdateTemp", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@id", appId);
cmd.Parameters.AddWithValue("@ProjectNumber", txtProjectNumber.Text);
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw new Exception("Exception adding coupon. " + ex.Message);
}
finally
{
conn.Close();
}
}
问题是传递的字段总是包含旧值。因此，如果进入页面时的值为“123”，我将其更改为“abc”并单击按钮，则传递“123”而不是“abc”。
抱歉发了这么长的帖子，我想了解所有细节。我对此感到困惑。谢谢！