我正在开发一个搜索人员的系统，然后在GridView中显示符合相关搜索条件的所有人，但没有显示任何数据，这真让我感到沮丧。 这是来自PatientSearch.aspx的面板/网格视图
<asp:UpdatePanel ID="pnlUpdate" runat="server">
<ContentTemplate>
<asp:Panel ID="pnlResults" runat="server" ScrollBars="Auto" >
<asp:GridView ID="gvSearch" runat="server" Font-Names = "Arial" Font-Size = "11pt" ForeColor = "#000000"
onselectedindexchanged="gvSearch_SelectedIndexChanged" AutoGenerateColumns = "false" DataKeyNames="patientid" AllowPaging = "true"
OnPageIndexChanging = "OnPaging" PageSize = "10" Width = "100%" HeaderStyle-BackColor = "#465c71" HeaderStyle-ForeColor = "#ffffff">
<Columns>
<%--Creates a select button that appear at the start of the grid view--%>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton Text="Select" ID="lnkSelect" runat="server" CommandName="Select" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="HC Number" ItemStyle-Wrap="False">
<ItemTemplate>
<%--This will be the first field to appear beside the select button--%>
<asp:Label ID="lblHCNum" Text='<%# Eval("HC_Number") %>' runat="server" />
</ItemTemplate>
</asp:TemplateField>
<%--Bound fields will place them in a specific order--%>
<asp:BoundField DataField = "PatientNumber" HeaderText="Patient Number"/>
<asp:BoundField DataField = "Surname" HeaderText="Surname"/>
<asp:BoundField DataField = "Forename" HeaderText="Forename"/>
<asp:BoundField DataField = "ReferredBy" HeaderText="Consultant" ItemStyle-Wrap="False" />
<asp:BoundField DataField = "Sex" HeaderText="Sex"/>
<asp:BoundField DataField = "DateOfBirth" HeaderText = "Date Of Birth" DataFormatString="{0:d}" />
<asp:BoundField DataField = "AppointmentDate" HeaderText = "Appointment Date" DataFormatString="{0:d}" />
</Columns>
</asp:GridView>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="gvSearch" />
</Triggers>
</asp:UpdatePanel>
此代码来自GridView等的PatientSearch.aspx.cs
public partial class PatientSearch : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//As this is the first page the user will have contact with when logged in this is where the limits of what they can and cannot do
//Are created to be used on all pages
//Open connection to database
string constr = ConfigurationManager.ConnectionStrings["OepdSQLConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
//Select columns required
using (SqlCommand cmd = new SqlCommand("SELECT [RoleName], [AddPermission], [EditPermission], [DeletePermission] FROM aspnet_Roles"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
//Fill required columns into datatable
sda.Fill(dt);
//Create stringbuilder to store RoleNames
StringBuilder addPermission = new StringBuilder();
StringBuilder editPermission = new StringBuilder();
StringBuilder deletePermission = new StringBuilder();
//Iterate through the datatable and add each correct row to the stringbuilder
for (int i = dt.Rows.Count - 1; i >= 0; i--)
{
DataRow dr = dt.Rows[i];
//only add the necessary rows to the string builder
if (dr["AddPermission"].ToString() == "True")
addPermission.AppendLine(string.Join(",", dr.ItemArray));
if (dr["EditPermission"].ToString() == "True")
editPermission.AppendLine(string.Join(",", dr.ItemArray));
if (dr["DeletePermission"].ToString() == "True")
deletePermission.AppendLine(string.Join(",", dr.ItemArray));
}
//Remove the unnecessary data from the string
addPermission.Replace(",True", ""); addPermission.Replace(",False", "");
editPermission.Replace(",True", ""); editPermission.Replace(",False", "");
deletePermission.Replace(",True", ""); deletePermission.Replace(",False", "");
//Convert stringbuilder to string to allow it to be compared
var add = addPermission.ToString();
var edit = editPermission.ToString();
var delete = deletePermission.ToString();
//Retrieve all roles the current user has access to
var userRoles = Roles.GetRolesForUser(User.Identity.Name);
if (!userRoles.Any(u => add.Contains(u)))
{
btnNewRecord.Enabled = false;
}
//Store what permissions are granted to which roles
Session["AddPermission"] = add;
Session["EditPermission"] = edit;
Session["DeletePermission"] = delete;
}
}
}
}
DataSet ds = (DataSet)Session["DS"];
// if (ds == null)
//{
//Make the menu inaccessable if no record has been selected, Due to menu being ambiguous System.Web.UI.WebControls is required
//System.Web.UI.WebControls.Menu MyMasterMenu = (System.Web.UI.WebControls.Menu)Master.FindControl("NavigationMenu");
//MyMasterMenu.Visible = false;
//}
//Hide the export buttons if the gridview is empty
if (gvSearch.DataSource == null)
{
//imgWord.Visible = false;
imgExcel.Visible = false;
lblExport.Visible = false;
}
else
{
//imgWord.Visible = true;
imgExcel.Visible = true;
lblExport.Visible = true;
}
//Hide label that catches any errors from user
lblErrors.Visible = false;
if (Session["RecordSuccessfullyDeleted"] != null)
{
//Message that has been passed from another page, informs the user that the record has ben successfully deleted
string deletedID = Session["RecordSuccessfullyDeleted"].ToString();
lblErrors.Text = deletedID + " Succesfully Deleted!";
//calls the popup to display a notification
dvMsg.Visible = true;
lblMsg.Text = "" + lblErrors.Text;
//To prevent message appearing multiple times
Session["RecordSuccessfullyDeleted"] = null;
}
else
{
dvMsg.Visible = false;
}
}
//Tells the page what to do once the user has selected a patient
protected void gvSearch_SelectedIndexChanged(object sender, EventArgs e)
{
DataSet ds = new DataSet();
int index = gvSearch.SelectedIndex;
string strConString = ConfigurationManager.ConnectionStrings["OepdSQLConnectionString"].ConnectionString;
SqlConnection myConnect = new SqlConnection(strConString);
myConnect.ConnectionString = strConString;
string strCommandText = "prcPersonalSelectedByPatientIdRetrieve";
try
{
SqlCommand sqlCmd = new SqlCommand(strCommandText, myConnect);
sqlCmd.CommandType = CommandType.StoredProcedure;
sqlCmd.Parameters.Add(new SqlParameter("@PatientNumber", gvSearch.DataKeys[index].Value.ToString()));
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = sqlCmd;
da.Fill(ds, "personal");
//Needed to reset the clinical eval page for newly selected patient
Session["NDS"] = null;
}
catch (Exception fe)
{
lblMoreErrors.Text = "Error: " + fe.Message;
}
try
{
//Assigns the selected patients details to the dataset and redirects the user to the personal page
Session["DS"] = ds;
Response.Redirect("~/UserPages/PatientDetails.aspx");
}
catch (Exception er)
{
lblErrors.Text = "Error: " + er.Message;
}
}
//Tells the gridview what to do when the page change is selected
protected void OnPaging(object sender, GridViewPageEventArgs e)
{
this.DataBindSearch();
gvSearch.PageIndex = e.NewPageIndex;
gvSearch.DataBind();
}
protected void BtnResetSearch(object sender, EventArgs e)
{
//Deletes all current criteria enetered and refreshes the page
Session["ViewState"] = null;
Response.Redirect("~/UserPages/PatientSearch.aspx");
}
protected void BtnSearch(object sender, EventArgs e)
{
//Sets the panel properties after the button is clicked, this helps avoid the empty white
//space at the bottom if the property is assigned when nothing is there
pnlResults.Style.Add("height", "500px");
this.DataBindSearch();
}
protected void BtnAddPatient(object sender, EventArgs e)
{
Session.Remove("DS");
Response.Redirect("~/UserPages/AddPatient.aspx", false);
}
protected void DataBindSearch()
{
DataSet ds = new DataSet();
string strConString = ConfigurationManager.ConnectionStrings["OepdSQLConnectionString"].ConnectionString;
SqlConnection myConnect = new SqlConnection(strConString);
myConnect.ConnectionString = strConString;
string strCommandText = "prcPersonalByPatientIdSelect";
//Now allows partial searches eg. Surname: M will return all surnames with M in it
try
{
SqlCommand sqlCmd = new SqlCommand(strCommandText, myConnect);
sqlCmd.CommandType = CommandType.StoredProcedure;
if (txtPatientNumber.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@PatientNumber", txtPatientNumber.Text));
}
if (txtHCNumber.Text != "___-___-____")
{
sqlCmd.Parameters.Add(new SqlParameter("@HC_Number", txtHCNumber.Text));
}
if (txtPatientSurname.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@Surname", txtPatientSurname.Text));
}
if (txtPatientFirstName.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@Forename", txtPatientFirstName.Text));
}
if (dpdConsultant.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@Consultant", dpdConsultant.Text));
}
if (dpdSex.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@Sex", dpdSex.Text));
}
//Date of Birth Search
if (txtDateOfBirth.Text != "")
{
//Required for use of between dates
string dateDoB = txtDateOfBirth.Text;
DateTime date = Convert.ToDateTime(dateDoB);
sqlCmd.Parameters.Add(new SqlParameter("@DateOfBirth", date));
}
if (txtDateOfBirthTo.Text != "")
{
if (txtDateOfBirthTo.Text == "*")
{
//Carries out the funtion of the wildcard
DateTime now = DateTime.Now;
sqlCmd.Parameters.Add(new SqlParameter("@DateOfBirthEnd", now));
}
else
{
//Required for use of between dates
string dateDoB = txtDateOfBirthTo.Text;
DateTime date = Convert.ToDateTime(dateDoB);
sqlCmd.Parameters.Add(new SqlParameter("@DateOfBirthEnd", date));
}
}
//Diagnosis Date Search
if (txtDiagnosisDate.Text != "")
{
//Required for use of between dates
string dateDD = txtDiagnosisDate.Text;
DateTime date = Convert.ToDateTime(dateDD);
sqlCmd.Parameters.Add(new SqlParameter("@DiagnosisDate", date));
}
if (txtDiagnosisDateTo.Text != "")
{
if (txtDiagnosisDateTo.Text == "*")
{
//Carries out the funtion of the wildcard
DateTime now = DateTime.Now;
sqlCmd.Parameters.Add(new SqlParameter("@DiagnosisDateEnd", now));
}
else
{
//Required for use of between dates
string dateDD = txtDiagnosisDateTo.Text;
DateTime date = Convert.ToDateTime(dateDD);
sqlCmd.Parameters.Add(new SqlParameter("@DiagnosisDateEnd", date));
}
}
//Examination Date Search
if (txtAppointmentDate.Text != "")
{
//Required for use of between dates
string dateED = txtAppointmentDate.Text;
DateTime date = Convert.ToDateTime(dateED);
sqlCmd.Parameters.Add(new SqlParameter("@AppointmentDate", date));
}
if (txtAppointmentDateEnd.Text != "")
{
if (txtAppointmentDateEnd.Text == "*")
{
//Carries out the funtion of the wildcard
DateTime now = DateTime.Now;
sqlCmd.Parameters.Add(new SqlParameter("@AppointmentDateEnd", now));
}
else
{
//Required for use of between dates
string dateAD = txtAppointmentDateEnd.Text;
DateTime date = Convert.ToDateTime(dateAD);
sqlCmd.Parameters.Add(new SqlParameter("@AppointmentDateEnd", date));
}
}
//Age at Examination Search
if (txtAgeAtExamination.Text != "")
{
//Required for use of between dates
string Age = txtAgeAtExamination.Text;
DateTime date = Convert.ToDateTime(Age);
sqlCmd.Parameters.Add(new SqlParameter("@Age", date));
}
if (txtAgeAtExaminationTo.Text != "")
{
if (txtAgeAtExamination.Text == "*")
{
//Carries out the funtion of the wildcard
DateTime now = DateTime.Now;
sqlCmd.Parameters.Add(new SqlParameter("@AgeEnd", now));
}
else
{
//Required for use of between dates
string Age = txtAgeAtExamination.Text;
DateTime date = Convert.ToDateTime(Age);
sqlCmd.Parameters.Add(new SqlParameter("@AgeEnd", date));
}
}
//EXAMINATION CHECKBOXES
//Full-field ERG Checkbox
if (chkERG.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@FullField_ERG", chkERG.Checked));
}
//Pattern ERG Checkbox
if (chkPERG.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@PatternERG", chkPERG.Checked));
}
//EOG Checkbox
if (chkEOG.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("EOG", chkEOG.Checked));
}
//Pattern VEP Checkbox
if (chkPVEP.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@PatternVEP", chkPVEP.Checked));
}
//Flash VEP Checkbox
if (chkFVEP.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@FlashVEP", chkFVEP.Checked));
}
//Comb VEP/ERG Checkbox
if (chkVEPERG.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@CombVEP_ERG", chkVEPERG.Checked));
}
//Binoc PVEP Checkbox
if (chkBPVEP.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@BinocPVEP", chkBPVEP.Checked));
}
//ATTENDANCE
if (dpdByAttendance.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@Attended", dpdByAttendance.Text));
}
if (dpdTestedBy.Text != "")
{
sqlCmd.Parameters.Add(new SqlParameter("@TestedBy", dpdTestedBy.Text));
}
//
//Awaiting Technical Report
if (chkAwaitingTechnicalReport.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@AwaitingTechnicalReport", chkAwaitingTechnicalReport.Checked));
}
//Feedback Patients
if (chkFeedbackPatients.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@FeedbackPatients ", chkFeedbackPatients.Checked));
}
//Interesting Patients
if (chkInterestingPatients.Checked)
{
sqlCmd.Parameters.Add(new SqlParameter("@InterestingPatients", chkInterestingPatients.Checked));
}
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = sqlCmd;
da.Fill(ds, "personal");
DataTable dt = new DataTable();
da.Fill(dt);
//Counts the number of results found
lblResults.Text = "Results Found: " + ds.Tables.Cast<DataTable>().Sum(x => x.Rows.Count).ToString();
//Finally, all results matching the criteria will be placed into the gridview
gvSearch.DataBind();
//Adds the export button if more than zero results are found
if (ds.Tables.Cast<DataTable>().Sum(x => x.Rows.Count) > 0)
{
//imgWord.Visible = true;
imgExcel.Visible = true;
lblExport.Visible = true;
}
Session["CurrentData"] = dt;
}
catch (Exception fe)
{
lblErrors.Text = "Error: " + fe.Message;
}
}
所有帮助对我来说都非常有价值，因为它让我非常沮丧。
提前致谢
P.S，我已经编辑并添加了整个代码，看看是否有任何明显的错过。
答案 0 :(得分：0)
您需要将数据源分配给gridview，是否设置了
gvSearch.DataSource=(DataSet) Session["DS"];
gvSearch.Databind();