我有按钮点击事件的问题并回发。我有一个包含一些文本框和一些下拉列表的页面。我从数据库填充那些文本框和ddls。我也有2个按钮。其中之一是使用文本框和下拉列表更新数据库。第二个按钮显示其他数据，具体取决于下拉列表中的一个值。我的问题是，当我点击更新按钮时，数据库会更新，文本框和ddl中的数据会被更改，但是当我进入地址选项卡并按Enter键时，我会得到旧数据（在数据库中，所有内容都会更改为新值）。我可以添加方法
if（IsPostBack）
并且数据将始终保持新鲜，但在这种情况下，我将无法更改显示其他数据的下拉列表中的值（自动回发后会将数据加载到此ddl中）。这有什么解决方法吗？如果我的描述不清楚，请告诉我。
EDIT1添加C＃代码
public partial class EditStaff : System.Web.UI.Page
{
Methods methods = new Methods();
IPrincipal p = HttpContext.Current.User;
protected void Page_Load(object sender, EventArgs e)
{
string soeid = Convert.ToString(Request["soeid"]);
DataSet dsUserDetails = new DataSet();
DataTable dtUserDetails = new DataTable();
DataSet dsDDLs = new DataSet();
if (!IsPostBack)
{
GetDDLsItems();
FillFields();
}
else
{
//FillFields();
}
}
protected void btnUpdate_Click(object sender, EventArgs e)
{
string update_error = "";
string SOEID = txtSOEID.Text;
string firstName = txtFirstName.Text;
string lastName = txtLastName.Text;
string email = txtEmail.Text.Trim();
int remsCode = Convert.ToInt32(ddlREMS.SelectedItem.ToString());
int active = Convert.ToInt32(ddlActive.SelectedValue);
int isGVO = Convert.ToInt32(ddlIsGVO.SelectedValue);
int gvoTeamID = Convert.ToInt32(ddlGVOTeams.SelectedValue);
int profileID = Convert.ToInt32(ddlProfiles.SelectedValue);
int isSOW = Convert.ToInt16(ddlIsSOW.SelectedValue);
int headcount = Convert.ToInt32(ddlHeadcount.SelectedValue);
string updater_domain = p.Identity.Name.ToString();
string updater = "";
int index = updater_domain.IndexOf("\\");
int email_at_index = email.IndexOf("@");
if (index != -1)
{
updater = updater_domain.Substring(index + 1, 7);
}
else
{
updater = updater_domain;
}
if (firstName.Length < 2)
{
update_error = "First Name should have at least 2 characters. ";
lblStatus.Text = update_error;
lblStatus.ForeColor = System.Drawing.Color.Red;
lblStatus.Visible = true;
}
else if (lastName.Length < 2)
{
update_error = update_error + "Last Name should have at least 2 characters. ";
lblStatus.Text = update_error;
lblStatus.ForeColor = System.Drawing.Color.Red;
lblStatus.Visible = true;
}
else if (email_at_index == -1 && email.Length < 5)
{
update_error = update_error + "Invalid email address.";
lblStatus.Text = update_error;
lblStatus.ForeColor = System.Drawing.Color.Red;
lblStatus.Visible = true;
}
else
{
// create ConnectDatabase object to get acces to its methods
ConnectDatabase connectDB = new ConnectDatabase();
IDBManager dbManager = connectDB.ConnectDB();
DataSet ds = new DataSet();
try
{
dbManager.Open();
dbManager.CreateParameters(13);
dbManager.AddParameters(0, "@SOEID", SOEID);
dbManager.AddParameters(1, "@firstName", firstName);
dbManager.AddParameters(2, "@LastName", lastName);
dbManager.AddParameters(3, "@Email", email);
dbManager.AddParameters(4, "@REMSCode", remsCode);
dbManager.AddParameters(5, "@Active", active);
dbManager.AddParameters(6, "@IsGVO", isGVO);
dbManager.AddParameters(7, "@gvoTeamID", gvoTeamID);
dbManager.AddParameters(8, "@profileID", profileID);
dbManager.AddParameters(9, "@isSOW", isSOW);
dbManager.AddParameters(10, "@headcount", headcount);
dbManager.AddParameters(11, "@lastUpdatedBy", updater);
dbManager.AddParameters(12, "@status", active);
dbManager.ExecuteNonQuery(CommandType.StoredProcedure, "sp_update_user");
}
catch (Exception error)
{
HttpContext.Current.Response.Write(error.ToString());
}
finally
{
dbManager.Close();
dbManager.Dispose();
lblStatus.Visible = true;
lblStatus.Text = "User data updated successfully.";
lblStatus.ForeColor = System.Drawing.Color.Green;
FillFields();
}
}
}
protected void btnCancel_Click(object sender, EventArgs e)
{
FillFields();
gvREMSDetails.Visible = false;
}
private void FillFields()
{
string soeid = Convert.ToString(Request["soeid"]);
DataSet dsUserDetails = new DataSet();
DataTable dtUserDetails = new DataTable();
DataSet dsDDLs = new DataSet();
dsUserDetails = GetUserDetails(soeid);
dtUserDetails = dsUserDetails.Tables[0];
string gvoTeam = dtUserDetails.Rows[0].ItemArray[8].ToString();
string profile = dtUserDetails.Rows[0].ItemArray[10].ToString();
string remsCode = dtUserDetails.Rows[0].ItemArray[4].ToString();
txtSOEID.Text = dtUserDetails.Rows[0].ItemArray[0].ToString();
txtFirstName.Text = dtUserDetails.Rows[0].ItemArray[1].ToString();
txtLastName.Text = dtUserDetails.Rows[0].ItemArray[2].ToString();
txtEmail.Text = dtUserDetails.Rows[0].ItemArray[3].ToString();
ddlREMS.SelectedValue = remsCode.ToString();
txtAddress.Text = dtUserDetails.Rows[0].ItemArray[5].ToString();
//Response.Write((Convert.ToInt16(dtUserDetails.Rows[0].ItemArray[6])).ToString());
ddlActive.SelectedValue = (Convert.ToInt16(dtUserDetails.Rows[0].ItemArray[6])).ToString();
ddlIsGVO.SelectedValue = (Convert.ToInt16(dtUserDetails.Rows[0].ItemArray[7])).ToString();
ddlGVOTeams.SelectedValue = gvoTeam;
ddlProfiles.SelectedValue = profile;
ddlIsSOW.SelectedValue = (Convert.ToInt16(dtUserDetails.Rows[0].ItemArray[12])).ToString();
lblLastUpdatedBy_value.Text = dtUserDetails.Rows[0].ItemArray[14].ToString();
lblLastUpdatedDate_value.Text = dtUserDetails.Rows[0].ItemArray[15].ToString();
}
protected void btnGetREMSdetails_Click(object sender, EventArgs e)
{
//int remsCode = Convert.ToInt32(ddlREMS.SelectedValue);
// create ConnectDatabase object to get acces to its methods
ConnectDatabase connectDB = new ConnectDatabase();
IDBManager dbManager = connectDB.ConnectDB();
DataSet ds = new DataSet();
try
{
dbManager.Open();
dbManager.CreateParameters(1);
dbManager.AddParameters(0, "@remscode", Convert.ToInt32(ddlREMS.SelectedValue));
ds = dbManager.ExecuteDataSet(CommandType.Text, "select * from vwREMSDetails where [rems code] = @remscode");
gvREMSDetails.DataSource = ds;
gvREMSDetails.DataBind();
gvREMSDetails.Visible = true;
}
catch (Exception error)
{
HttpContext.Current.Response.Write(error.ToString());
}
finally
{
dbManager.Close();
dbManager.Dispose();
}
}
private static DataSet GetUserDetails(string soeid)
{
// create ConnectDatabase object to get acces to its methods
ConnectDatabase connectDB = new ConnectDatabase();
IDBManager dbManager = connectDB.ConnectDB();
DataSet ds = new DataSet();
try
{
dbManager.Open();
dbManager.CreateParameters(1);
dbManager.AddParameters(0, "@soeid", soeid);
ds = dbManager.ExecuteDataSet(CommandType.Text, "select * from vwUsersDetails where soeid = @soeid");
}
catch (Exception error)
{
HttpContext.Current.Response.Write(error.ToString());
}
finally
{
dbManager.Close();
dbManager.Dispose();
}
return ds;
}
private void GetDDLsItems()
{
// create ConnectDatabase object to get acces to its methods
ConnectDatabase connectDB = new ConnectDatabase();
IDBManager dbManager = connectDB.ConnectDB();
DataSet ds = new DataSet();
try
{
dbManager.Open();
ds = dbManager.ExecuteDataSet(CommandType.StoredProcedure, "sp_select_edit_user_ddls");
ddlREMS.DataSource = ds.Tables[0];
ddlREMS.DataTextField = "remsCode";
ddlREMS.DataValueField = "remsCode";
ddlREMS.DataBind();
ddlActive.DataSource = ds.Tables[1];
ddlActive.DataTextField = "Active";
ddlActive.DataValueField = "ActiveID";
ddlActive.DataBind();
ddlIsGVO.DataSource = ds.Tables[2];
ddlIsGVO.DataTextField = "IsGVO";
ddlIsGVO.DataValueField = "IsGVOID";
ddlIsGVO.DataBind();
//methods.GetGVOFunctions(ddlGVOFunctions);
//int? gvoFunctionID = string.IsNullOrEmpty(ddlGVOFunctions.SelectedValue) ? (int?)null : (int?)Convert.ToInt32(ddlGVOFunctions.SelectedValue);
methods.GetGVOTeams(null, ddlGVOTeams);
ddlProfiles.DataSource = ds.Tables[3];
ddlProfiles.DataTextField = "profilename";
ddlProfiles.DataValueField = "profileID";
ddlProfiles.DataBind();
ddlIsSOW.DataSource = ds.Tables[4];
ddlIsSOW.DataTextField = "IsSOW";
ddlIsSOW.DataValueField = "IsSOWID";
ddlIsSOW.DataBind();
ddlHeadcount.DataSource = ds.Tables[5];
ddlHeadcount.DataTextField = "Headcount";
ddlHeadcount.DataValueField = "HeadcountID";
ddlHeadcount.DataBind();
}
catch (Exception error)
{
HttpContext.Current.Response.Write(error.ToString());
}
finally
{
dbManager.Close();
dbManager.Dispose();
}
}
}
答案 0 :(得分：1)
我不是100％我完全理解这个问题，但听起来你需要有
if(!IsPostBack)
{
// load dropdown data here
}
您将所有数据加载到下拉列表中，然后在下拉列表中
<asp:DropDownList SelectedIndexChanged="ddlDropdown_SelectedIndexChanged" id="ddlDropdown" AutoPostBack="true"></asp:DropDownList>
然后在你的代码背后有
protected void ddlDropDown_SelectedIndexChanged(object sender, EventArgs e)
{
}