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dropdown list in record update page not listing other records

I have a record update page which seems to populate all the fields, however the dropdown lists will only list the data from that particular record, it is not listing the other School Names and the Student Names. The two dropdown lists are cascaded i.e. selecting the School Name ddl should list only the Students that are from that school in the Student ddl.
Any help on this will be much appreciated, thank you.
Gridview code on tours.aspx
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" AllowPaging="true" OnPageIndexChanging="GridView1_PageIndexChanging" OnEditCommand="EditAddress" PageSize="5">
<Columns>
<asp:HyperLinkField Text="Update" DataNavigateUrlFields="TourId" DataNavigateUrlFormatString="~/abcrud1/tours_update.aspx?TourId={0}" />
<asp:BoundField DataField="TourId" HeaderText="TourId" HtmlEncode="false" />
<asp:BoundField DataField="VisitorName" HeaderText="VisitorName" HtmlEncode="false" />
<asp:BoundField DataField="VisitorSchoolId" HeaderText="VisitorSchoolId" HtmlEncode="false" />
<asp:BoundField DataField="SchName" HeaderText="SchName" HtmlEncode="false" />
<asp:BoundField DataField="TourDate" HeaderText="TourDate" HtmlEncode="false" />
<asp:BoundField DataField="StudentId" HeaderText="StudentId" HtmlEncode="false" />
<asp:BoundField DataField="FirstName" HeaderText="FirstName" HtmlEncode="false" />
<asp:BoundField DataField="LastName" HeaderText="LastName" HtmlEncode="false" />
</Columns>
</asp:GridView>
tour_update.aspx
<form id="form1" runat="server">
<div>
<table style="width: 50%;">
<tr>
<td style="width: 50%;">Tour Id:</td>
<td style="width: 50%;">
<asp:TextBox ID="txttourid" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 50%;">Visitor Name:</td>
<td style="width: 50%;">
<asp:TextBox ID="txtvisname" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 50%;">Visitor School:</td>
<td style="width: 50%;">
<asp:DropDownList ID="ddlvisschool" runat="server" AutoPostBack="true"></asp:DropDownList></td>
</tr>
<tr>
<td style="width: 50%;">Tour Date:</td>
<td style="width: 50%;">
<asp:TextBox ID="txttourdate" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 50%;">Student:</td>
<td style="width: 50%;">
<asp:DropDownList ID="ddlstudent" runat="server"></asp:DropDownList></td>
</tr>
<tr>
<td><asp:Button ID="btnUpdate" Text="Update" runat="server" OnClick="TourUpdate_click" /></td>
<td></td>
</tr>
</table>
</div>
</form>
tour_update.aspx.cs
{
public partial class tours_update : System.Web.UI.Page
{
string constr = ConfigurationManager.ConnectionStrings["SQLConnectionString2"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
{
if (!IsPostBack)
{
this.GetTour();
}
}
}
protected void TourUpdate_click(object sender, EventArgs e)
{
this.TourUpdate();
}
private int id
{
get
{
return !string.IsNullOrEmpty(Request.QueryString["TourId"]) ? int.Parse(Request.QueryString["TourId"]) : 0;
}
}
private void TourUpdate()
{
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("UPDATE tblCRUD1_Tour SET VisitorName=#VisitorName, VisitorSchoolId=#VisitorSchoolId, TourDate=#TourDate, StudentId=#StudentId WHERE TourId=#TourId", con))
{
cmd.Parameters.AddWithValue("#TourId", id);
cmd.Parameters.AddWithValue("#VisitorName", txtvisname.Text);
cmd.Parameters.AddWithValue("#VisitorSchoolId", ddlvisschool.SelectedItem.Value);
cmd.Parameters.AddWithValue("#TourDate", txttourdate.Text);
cmd.Parameters.AddWithValue("#StudentId", ddlstudent.SelectedItem.Value);
con.Open();
cmd.ExecuteNonQuery();
con.Close();
Response.Redirect("~/abcrud1/tours.aspx");
}
}
}
private void GetTour()
{
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(#"SELECT tblCRUD1_Tour.TourId, tblCRUD1_Tour.VisitorName, tblCRUD1_Tour.VisitorSchoolId, tblCRUD1_School.SchName, tblCRUD1_Tour.TourDate, tblCRUD1_Tour.StudentId, tblCRUD1_Student.FirstName, tblCRUD1_Student.LastName
FROM tblCRUD1_Tour
INNER JOIN tblCRUD1_Student ON tblCRUD1_Tour.StudentId = tblCRUD1_Student.StudentId
INNER JOIN tblCRUD1_School ON tblCRUD1_Student.LastSchoolId = tblCRUD1_School.SchId
WHERE tblCRUD1_Tour.TourId=#TourId", con))
{
cmd.Parameters.AddWithValue("#TourId", id);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
DataTable dt = new DataTable();
da.Fill(dt);
foreach (DataRow dr in dt.Rows)
{
this.txttourid.Text = dr["TourId"].ToString();
this.txtvisname.Text = dr["VisitorName"].ToString();
this.txttourdate.Text = dr["TourDate"].ToString();
ddlvisschool.DataSource = dt;
ddlvisschool.DataTextField = "SchName";
ddlvisschool.DataValueField = "VisitorSchoolId";
ddlvisschool.DataBind();
ddlstudent.DataSource = dt;
ddlstudent.DataTextField = "LastName";
ddlstudent.DataValueField = "StudentId";
ddlstudent.DataBind();
}
}
}
}
}
}
}
tours_add.aspx.cs
{
public partial class tours_add : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["SQLConnectionString2"].ConnectionString);
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Bindddlvisschool();
ddlstudent.Items.Insert(0, " Select Pupil ");
}
}
private void Bindddlvisschool()
{
con.Open();
string str = #"Select * FROM tblCRUD1_School ORDER BY SchName ASC";
SqlCommand cmd = new SqlCommand(str, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
ddlvisschool.DataSource = dt;
ddlvisschool.DataTextField = "SchName";
ddlvisschool.DataValueField = "SchId";
ddlvisschool.DataBind();
ddlvisschool.Items.Insert(0, new ListItem(" Choose Last School ", "0"));
ddlvisschool.SelectedIndex = 0;
con.Close();
}
protected void TourAdd_click(object sender, EventArgs e)
{
con.Open();
string str = #"INSERT INTO tblCRUD1_Tour (VisitorName,VisitorSchoolId,TourDate,StudentId) VALUES (#VisitorName,#VisitorSchoolId,#TourDate,#StudentId)";
SqlCommand cmd = new SqlCommand(str, con);
cmd.Parameters.AddWithValue("#VisitorName", txtvisname.Text);
cmd.Parameters.AddWithValue("#VisitorSchoolId", ddlvisschool.Text);
cmd.Parameters.AddWithValue("#TourDate", txttourdate.Text);
cmd.Parameters.AddWithValue("#StudentId", ddlstudent.Text);
cmd.ExecuteNonQuery();
lblmessage1.Text = "Tour added successfully";
con.Close();
Response.AddHeader("REFRESH", "3;URL=tours.aspx");
}
protected void ddlvisschool_SelectedIndexChanged(object sender, EventArgs e)
{
string get_SchId;
string get_SchName;
get_SchId = ddlvisschool.SelectedValue.ToString();
get_SchName = ddlvisschool.SelectedItem.Text;
if (get_SchId != "0")
{
con.Open();
SqlDataAdapter da;
DataSet ds = new DataSet();
string query;
query = "SELECT tblCRUD1_Tour.TourId, tblCRUD1_Tour.VisitorName, tblCRUD1_Tour.VisitorSchoolId, tblCRUD1_School.SchName, tblCRUD1_Tour.TourDate, tblCRUD1_Tour.StudentId, tblCRUD1_Student.FirstName, tblCRUD1_Student.LastName "
+ "FROM tblCRUD1_Tour "
+ "INNER JOIN tblCRUD1_Student ON tblCRUD1_Tour.StudentId = tblCRUD1_Student.StudentId "
+ "INNER JOIN tblCRUD1_School ON tblCRUD1_Student.LastSchoolId = tblCRUD1_School.SchId "
+ "WHERE tblCRUD1_Tour.VisitorSchoolId='" + get_SchId.ToString() + "' ORDER BY tblCRUD1_Student.LastName ASC";
da = new SqlDataAdapter(query, con);
da.Fill(ds);
if (ds.Tables[0].Rows.Count > 0)
{
ddlstudent.DataSource = ds;
ddlstudent.DataTextField = "LastName";
ddlstudent.DataValueField = "StudentId";
ddlstudent.DataBind();
//ddlstudent.Items.Insert(0, new ListItem(get_SchName.ToString(), "0"));
ddlstudent.SelectedIndex = 0;
}
else
{
ddlstudent.Items.Insert(0, "No Student");
ddlstudent.DataBind();
}
}
}
}
}

Dropdownlist not showing correct selected value in ASP.NET Repeater Web application

I have a few ASP.NET Repeaters that have drop down lists in them and they all need to be populated with the correct information and then display the selected value for each data row it is displaying. In one repeater (CompanyRepeater), the correct selected value is chosen. In another repeater (SoldRepeater), the correct selected value is NOT chosen. So the drop down list in CompanyRepeater does work but the one in SoldRepeater does not work. The code is the same for both repeaters and I cannot figure out why the second one is not working. Both drop down lists populate with the correct information but the second repeater does not display the correct selected value. Please help me figure out why the correct selected value is not being selected. Below is my code. Please let me know if there is anymore information needed to help me. Any help is much appreciated. First is my front end code.
<asp:Repeater ID="CompanyRepeater" runat="server" OnItemDataBound="CompanyRepeater_ItemDataBound" OnItemCommand="CompanyRepeater_ItemCommand">
<ItemTemplate>
<table>
<tr>
<td colspan="3" style="text-align: center;">
<h3 style="font-weight: bold;">Company</h3>
</td>
</tr>
<tr>
<td>Event Date:
<br />
<asp:TextBox ID="txtDate" runat="server" Text='<%#Eval("Date") %>'></asp:TextBox>
<asp:Label ID="lblCompID" runat="server" Text='<%#Eval("CompID") %>' Visible="false"></asp:Label>
</td>
<td rowspan="2">Notes:
<br />
<asp:TextBox ID="txtNotes" TextMode="MultiLine" Height="100px" Text='<%#Eval("Notes") %>' runat="server"></asp:TextBox>
</td>
<td>OldName
<br />
<asp:TextBox ID="txtOldNameChange" Text='<%#Eval("OldName") %>' runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>Country:
<asp:DropDownList ID="ddlCountry" AutoPostBack="true" runat="server" OnSelectedIndexChanged="ddlCountry_SelectedIndexChanged"></asp:DropDownList>
<br /> State:
<asp:DropDownList ID="ddlState" runat="server"></asp:DropDownList>
</td>
<td>New Name
<br />
<asp:TextBox ID="txtNewNameChange" runat="server" Text='<%#Eval("NewName") %>'></asp:TextBox>
</td>
<td rowspan="3" style="width: 50px; float: right;">
<asp:Button ID="btnUpdateName" runat="server" Text="Update" CommandName="Update" />
<br />
<asp:Button ID="btnDelete" runat="server" Text="Delete" OnClientClick="return confirm('Are you sure you want to delete this record?')" CommandName="Delete" CommandArgument='<%#Eval("CompID") %>' />
</td>
</tr>
</table>
</ItemTemplate>
<SeparatorTemplate>
<p> </p>
<br />
</SeparatorTemplate>
</asp:Repeater>
<hr />
<asp:Repeater ID="SoldRepeater" runat="server" OnItemDataBound="SoldRepeater_ItemDataBound" OnItemCommand="SoldRepeater_ItemCommand">
<ItemTemplate>
<table>
<tr>
<td colspan="3" style="text-align: center;">
<h3 style="font-weight: bold;">Sold Event</h3>
</td>
</tr>
<tr>
<td>Event Date:
<br />
<asp:TextBox ID="txtSoldDate" runat="server" Text='<%#Eval("EventDate") %>'></asp:TextBox>
<asp:Label ID="lblCompID" runat="server" Text='<%#Eval("CompID") %>' Visible="false"></asp:Label>
</td>
<td rowspan="2">Notes:
<br />
<asp:TextBox ID="txtSoldNotes" TextMode="MultiLine" Height="100px" Text='<%#Eval("Notes") %>' runat="server"></asp:TextBox>
</td>
<td>Sold to Company
<br />
<asp:TextBox ID="txtSoldTo" Text='<%#Eval("SoldToCompany") %>' runat="server"></asp:TextBox>
<br /> Sold to Type
<asp:DropDownList ID="ddlSoldTo" runat="server"></asp:DropDownList>
</td>
<td rowspan="2">
<asp:Button ID="btnUpdate" runat="server" Text="Update" CommandName="Update" CommandArgument='<%#Eval("CompID") %>' />
<br />
<asp:Button ID="btnDelete" runat="server" Text="Delete" OnClientClick="return confirm('Are you sure you want to delete this record?')" CommandName="Delete" CommandArgument='<%#Eval("CompID") %>' />
</td>
</tr>
</table>
</ItemTemplate>
<SeparatorTemplate>
<p> </p>
<br />
</SeparatorTemplate>
</asp:Repeater>
This is my backend code
protected void Page_Load(object sender, EventArgs e)
{
_cID = Convert.ToInt32(Request.QueryString["CompID"]);
if (!Page.IsPostBack)
{
PopulateCompanyRepeater();
PopulateSoldEvent();
}
}
private void PopulateCompanyRepeater()
{
DALAccessData a = new DALAccessData(connString);
_listInfo = a.GetCompInfo(_cID);
CompanyRepeater.DataSource = _listInfo;
CompanyRepeater.DataBind();
}
private void PopulateSoldEvent()
{
DALSectionAccessData a = new DALSectionAccessData(connString);
_listEvents = a.GetSoldEvents(_cID);
SoldRepeater.DataSource = _listEvents;
SoldRepeater.DataBind();
}
protected void CompanyRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
DropDownList ddl = (DropDownList)e.Item.FindControl("ddlCountry");
DropDownList ddl2 = (DropDownList)e.Item.FindControl("ddlState");
Corp co = (Corp)e.Item.DataItem;
Corp st = (Corp)e.Item.DataItem;
SqlDataAdapter sda;
DataSet ds = new DataSet();
try
{
using(cn = new SqlConnection(connString))
{
string s = "SELECT DISTINCT a.Country_ID, a.CountryName FROM States c INNER JOIN Countries a ON a.Country_ID = c.Country_ID";
cn.Open();
sda = new SqlDataAdapter(s, cn);
sda.Fill(ds);
ddl.DataSource = ds.Tables[0];
ddl.DataTextField = "CountryName";
ddl.DataValueField = "Country_ID";
ddl.DataBind();
cn.Close();
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
for (int i = 0; i < ddl.Items.Count; i++)
{
if (co.Country_ID == Convert.ToInt32(ddl.Items[i].Value))
{
ddl.Items[i].Selected = true;
}
else
{
ddl.Items[i].Selected = false;
}
}
try
{
using(cn = new SqlConnection(connString))
{
string s = "SELECT DISTINCT StateName, StateID FROM States WHERE Country_ID = " + ddl.SelectedValue;
cn.Open();
sda = new SqlDataAdapter(s, cn);
sda.Fill(ds);
ddl2.DataSource = ds.Tables[0];
ddl2.DataTextField = "StateName";
ddl2.DataValueField = "StateID";
ddl2.DataBind();
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
for (int i = 0; i < ddl2.Items.Count; i++)
{
if (!String.IsNullOrEmpty(ddl2.Items[i].Value))
{
if (st.StateID == Convert.ToInt32(ddl2.Items[i].Value))
{
ddl2.Items[i].Selected = true;
}
else
{
ddl2.Items[i].Selected = false;
}
}
}
}
}
protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList ddl = (DropDownList)CompanyRepeater.Items[0].FindControl("ddlCountry");
DropDownList ddl2 = (DropDownList)CompanyRepeater.Items[0].FindControl("ddlState");
ddl2.Items.Clear();
using(SqlConnection conn = new SqlConnection(connString))
{
using(SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "SELECT StateName, StateID FROM States WHERE Country_ID = " + ddl.SelectedValue;
cmd.Connection = conn;
conn.Open();
using(SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
ListItem _listStates = new ListItem();
_listStates.Text = sdr["StateName"].ToString();
_listStates.Value = sdr["StateID"].ToString();
ddl2.Items.Add(_listStates);
}
}
}
}
ddl2.AppendDataBoundItems = true;
ddl2.Items.Insert(0, new ListItem("Select a State", "-1"));
ddl2.SelectedIndex = -1;
}
protected void SoldRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
DropDownList ddl = (DropDownList)e.Item.FindControl("ddlSoldTo");
int x = ((CorpEvents)e.Item.DataItem).SoldToTypeID;
//Corp x = (Corp)e.Item.DataItem;
SqlDataAdapter sda;
DataSet ds = new DataSet();
try
{
using(cn = new SqlConnection(connString))
{
string s = "SELECT SoldToTypeID, SoldToTypeName FROM SoldToType";
cn.Open();
sda = new SqlDataAdapter(s, cn);
sda.Fill(ds);
ddl.DataSource = ds.Tables[0];
ddl.DataTextField = "SoldToTypeName";
ddl.DataValueField = "SoldToTypeID";
ddl.DataBind();
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
for (int i = 0; i < ddl.Items.Count; i++)
{
if (x == Convert.ToInt32(ddl.Items[i].Value))
{
ddl.Items[i].Selected = true;
//i = 9;
}
else
{
ddl.Items[i].Selected = false;
}
}
}
}
My data access layer code
public List <Corp> GetCompInfo(int a)
{
List <Corp> _listInfo = new List <Corp> ();
DataTable dt = new DataTable();
DataSet ds = new DataSet();
//create the connection and command objects
SqlConnection connection = new SqlConnection(_dbConnection);
SqlCommand command = new SqlCommand();
//populate the command object
command.Connection = connection;
command.CommandText = "SELECT a.CompID, CONVERT(varchar(10), a.Date, 120) AS Date, a.Notes, b.StateID, b.OldName, b.NewName, c.Country_ID FROM NameChange b INNER JOIN CompanyInfo a ON a.CompID = b.CompID INNER JOIN States c ON c.StateID = b.StateID WHERE a.CompID = " + a;
using(connection)
{
using(command)
{
connection.Open();
ds.Load(command.ExecuteReader(), LoadOption.OverwriteChanges, new string[] {
"MyTable"
});
dt = ds.Tables["MyTable"];
}
}
foreach(DataRow row in dt.Rows)
{
Corp e = new Corp();
e.CompID = Convert.ToInt32(row["CompID"].ToString());
e.NewName = row["NewName"].ToString();
e.OldName = row["OldName"].ToString();
e.StateID = Convert.ToInt32(row["StateID"].ToString());
e.Notes = row["Notes"].ToString();
e.CountryID = Convert.ToInt32(row["Country_ID"].ToString());
e.Date = Convert.ToDateTime(row["Date"].ToString());
e.Date.ToShortDateString();
_listInfo.Add(e);
}
return _listInfo;
}
public List <Corp> GetSoldEvents(int a)
{
List <Corp> _listInfo = new List <Corp> ();
DataTable dt = new DataTable();
DataSet ds = new DataSet();
//create the connection and command objects
SqlConnection connection = new SqlConnection(_dbConnection);
SqlCommand command = new SqlCommand();
//populate the command object
command.Connection = connection;
command.CommandText = "SELECT a.CompID, a.Notes, a.Date, b.SoldToCompany, c.SoldToTypeName, c.SoldToTypeID FROM CompanyInfo a INNER JOIN SoldEvent b ON a.CompID = b.CompID INNER JOIN SoldToType c ON b.SoldToTypeID = c.SoldToTypeID WHERE a.CompID = " + a;
using(connection)
{
using(command)
{
connection.Open();
ds.Load(command.ExecuteReader(), LoadOption.OverwriteChanges, new string[] {
"MyTable"
});
dt = ds.Tables["MyTable"];
}
}
foreach(DataRow row in dt.Rows)
{
Corp e = new Corp();
e.CompID = Convert.ToInt32(row["CompID"].ToString());
e.SoldToCompany = row["SoldToCompany"].ToString();
e.SoldToTypeName = row["SoldToTypeName"].ToString();
e.SoldToTypeID = Convert.ToInt32(row["SoldToTypeID"].ToString());
e.Notes = row["Notes"].ToString();
e.EventDate = Convert.ToDateTime(row["Date"].ToString());
e.EventDate.ToShortDateString();
_listInfo.Add(e);
}
return _listInfo;
}

IMHO, your method of setting the selected value is rather cumbersome. This entire section of code:
for (int i = 0; i < ddl.Items.Count; i++)
{
if (x == Convert.ToInt32(ddl.Items[i].Value))
{
ddl.Items[i].Selected = true;
//i = 9;
}
else
{
ddl.Items[i].Selected = false;
}
}
Can be replaced with a single line:
ddl.SelectedValue = x.ToString();
In addition, once you do find the matching value you continue to loop on the items, rather than exiting out of the loop.
Try these changes, they may solve the problem for you.
A few other items that I noticed:
The code to retrieve the SoldToType is called for each item in the
repeater. I would suggest retrieving this data once and referencing
it for each item, rather than going to the db each time.
Your SQL code is wide open to SQL injection. Use parameterized queries, like so:
cmd.CommandText = "SELECT StateName, StateID FROM States WHERE Country_ID = #CountryID";
...
cmd.Parameters.AddWithValue("CountryID", ddl.SelectedValue);

On Button click, dropdown loses its value

I have two dropdowns. First is for State and second is one for the City. When I select the state, its respective city gets populated in the next dropdown. I have one option to add more cities through textbox on button click while selecting the Other option from the city dropdownlist.
The issue is that whenever i am adding the city from the textbox, the it gets inserted into the respective state and also the dropdownlist loses its value. I tried debugging but couldn't find the exact issue.
Please see the code for your reference:
protected void btnAddDropDown_Click1(object sender, EventArgs e)
{
using (SqlConnection con = new SqlConnection(constring))
{
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "Add_CityforLocation";
cmd.Parameters.Add("#ID", SqlDbType.VarChar).Value = 0;
cmd.Parameters.Add("#CountryName", SqlDbType.VarChar).Value = "India";
cmd.Parameters.Add("#CityName", SqlDbType.VarChar).Value = txtOtherCity.Text.Trim();
cmd.Parameters.Add("#StateName", SqlDbType.VarChar).Value = ddllocation1.SelectedItem.ToString();
cmd.Connection = con;
try
{
cmd.ExecuteNonQuery();
BindContrydropdown();
}
catch (Exception ex)
{
Response.Write(ex.Message);//You Can Haave Messagebox here
}
finally
{
con.Close();
}
}
}
protected void BindContrydropdown()
{
//conenction path for database
//string connection = WebConfigurationManager.ConnectionStrings["myconn"].ConnectionString;
using (SqlConnection con = new SqlConnection(constring))
{
con.Open();
SqlCommand cmd = new SqlCommand("Select Id,CityName From Career.Location", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
ddllocation1.DataSource = ds;
ddllocation1.DataTextField = "CityName";
ddllocation1.DataValueField = "Id";
ddllocation1.DataBind();
ddllocation1.Items.Insert(0, new ListItem("--Select--", "0"));
ddllocation1.Items.Insert(1, new ListItem("--OTHER--", "0"));
con.Close();
}
}
Also, see the HTML for the same:-
<tr>
<td class="td">Location/State</td>
<td>
<asp:DropDownList CssClass="txtfld-popup" ID="ddllocation1" OnSelectedIndexChanged="ddllocation1_SelectedIndexChanged" runat="server" AutoPostBack="true"></asp:DropDownList>
<asp:RequiredFieldValidator CssClass="error_msg" ID="RequiredFieldValidator1" ControlToValidate="ddllocation1" runat="server" ErrorMessage="Please enter location" InitialValue="--Select--" SetFocusOnError="true"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="td">Location/City</td>
<td>
<asp:DropDownList CssClass="txtfld-popup" ID="ddlLocation" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ddlLocation_SelectedIndexChanged"></asp:DropDownList>
<asp:RequiredFieldValidator CssClass="error_msg" ID="reqLocation" ControlToValidate="ddlLocation" runat="server" ErrorMessage="Please enter location" InitialValue="--Select--" SetFocusOnError="true"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:TextBox ID="txtOtherCity" runat="server" Visible="false" CssClass="txtfld-popup"></asp:TextBox>
<asp:Button ID="btnAddDropDown" runat="server" Width="63" Text="Add" CausesValidation="false" OnClick="btnAddDropDown_Click1" />
</td>
</tr>

Try this
try
{
if(!IsPostBack)
{
cmd.ExecuteNonQuery();
BindContrydropdown();
}
}

How to bind values in usercontrol dropdownlist?

I bind the values in usercontrol dropdownlist
But when I add the usercontrol row that time values are not binded in dropdownlist
Code:
.ascx
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="TimesheetUserControl.ascx.cs" Inherits="Portal.TimesheetUserControl" %>
<table>
<tr>
<td>
<asp:DropDownList ID="DropDownActivities" Width="150px" runat="server"></asp:DropDownList>
</td>
<td>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="TextBox5" runat="server"></asp:TextBox>
</td>
<td>
<asp:TextBox ID="TextBox7" runat="server"></asp:TextBox>
</td>
</tr>
.aspx
<uc:Timesheet ID="Timesheet" runat="server" />
<asp:Repeater ID="rpt1" runat="server">
<ItemTemplate>
</ItemTemplate>
</asp:Repeater>
<asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click"/>
.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostback)
{
BindActivities();
}
}
protected void BindActivities()
{
DropDownList dropActivities = Timesheet.FindControl("DropDownActivities") as DropDownList;
DbConnection.Open();
OleDbCommand cmd1 = new OleDbCommand("select designation from emp_master where username = '" + username + "'", DbConnection);
OleDbDataAdapter da = new OleDbDataAdapter(Deptcmd);
DataSet ds = new DataSet();
da.Fill(ds);
// DbConnection.Close();
dropActivities.DataSource = ds;
dropActivities.DataTextField = "ActivityName";
dropActivities.DataBind();
dropActivities.Items.Insert(0, new ListItem("--Select--", "0"));
}
public List<string> NoOfControls
{
get
{
return ViewState["NoOfControls"] == null ? new List<string>() : (List<string>)ViewState["NoOfControls"];
}
set
{
ViewState["NoOfControls"] = value;
}
}
protected override void LoadViewState(object savedState)
{
base.LoadViewState(savedState);
if (IsPostBack)
{
GenerateControls();
}
}
private void GenerateControls()
{
foreach (string i in NoOfControls)
{
TimesheetUserControl ctrl = (TimesheetUserControl)Page.LoadControl("TimesheetUserControl.ascx");
ctrl.ID = i;
this.rpt1.Controls.Add(ctrl);
}
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
Button thisButton = (Button)sender;
List<string> temp = null;
var uc = (TimesheetUserControl)this.LoadControl(#"TimesheetUserControl.ascx");
string id = Guid.NewGuid().ToString();
uc.ID = id;
temp = NoOfControls;
temp.Add(id);
NoOfControls = temp;
rpt1.Controls.Add(uc);
}
In the below image if Click add button rows are added but in second values are not binded in dropdownlist
Any ideas? Thanks in advance.

find the user controls by the id you given and then you can find the DropDownList inside the usercontrol.
protected void BindActivities()
{
foreach (string controlName in NoOfControls)
{
TimesheetUserControl userControl = Timesheet.FindControl(controlName) as TimesheetUserControl;
if(userControl == null) return;
DropDownList dropActivities = userControl.FindControl("DropDownActivities") as DropDownList;
if(dropActivities == null) return;
DbConnection.Open();
OleDbCommand cmd1 = new OleDbCommand("select designation from emp_master where username = '" + username + "'", DbConnection);
OleDbDataAdapter da = new OleDbDataAdapter(Deptcmd);
DataSet ds = new DataSet();
da.Fill(ds);
// DbConnection.Close();
dropActivities.DataSource = ds;
dropActivities.DataTextField = "ActivityName";
dropActivities.DataBind();
dropActivities.Items.Insert(0, new ListItem("--Select--", "0"));
}
}

How to Edit,Update and Delete Rows in GridView in ASP.NET

I am retrieving Data From Database into GridView.
I don't know how to Edit and Delete row in GridView and it Also Update in Database.
Also please Tell me if their is any mistake in my Code
<head runat="server">
<title></title>
<style type="text/css">
.style1
{
width: 248px;
}
.style2
{
width: 100%;
}
.style3
{
height: 180px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div class="style3">
<h1 align="center">Students Personal Information
</h1>
<table class="style2">
<tr>
<td class="style1">
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style1">
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style1">
<asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
</td>
<td>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style1">
<asp:Button ID="Button1" runat="server" Text="Insert Data"
onclick="Button1_Click" />
</td>
<td>
<asp:Button ID="Button2" runat="server" onclick="Button2_Click"
Text="Show All Students" Width="128px" />
</td>
</tr>
</table>
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
</div>
<br />
<asp:Label ID="Label4" runat="server"></asp:Label>
<br />
<asp:GridView ID="GridView1" runat="server"
onrowcancelingedit="GridView1_RowCancelingEdit"
onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating">
<Columns>
<asp:CommandField ButtonType="Button" ShowEditButton="True" />
</Columns>
</asp:GridView>
</form>
</body>
</html>
enter code here
And my back-end code is
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
public partial class _Default : System.Web.UI.Page
{
SqlConnection conn = new SqlConnection("Data Source=DATA_NET_81_SOF;Initial
Catalog=Students;Integrated Security=True");
SqlCommand cmd = new SqlCommand();
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Label1.Text = "Student's Name";
Label2.Text = "Student's Class";
Label3.Text = "Student's Roll Number";
}
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
SqlCommand cmd = new SqlCommand("Insert INTO Personalinfo(StudentName,StudentClass,StudentRollNo)values('" + TextBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "')", conn);
conn.Open();
cmd.Parameters.AddWithValue("StudentName", TextBox1.Text);
cmd.Parameters.AddWithValue("StudentClass", TextBox2.Text);
cmd.Parameters.AddWithValue("StudentRollno", TextBox3.Text);
cmd.ExecuteNonQuery();
Label4.Text = "Data Is Stored";
}
catch (Exception ex)
{
Label4.Text = ex.Message;
}
}
protected void Button2_Click(object sender, EventArgs e)
{
SqlCommand sql = new SqlCommand("Select * from Personalinfo", conn);
SqlDataAdapter da = new SqlDataAdapter(sql);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = (ds);
GridView1.DataBind();
}
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView1.EditIndex = e.NewEditIndex;
GridView1.DataBind();
}
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
e.Cancel = true;
GridView1.EditIndex = -1;
}
}

private string connection = #"...";
protected void Button1_Click(object sender, EventArgs e)
{
using(SqlConnection con = new SqlConnection(connection))
{
try
{
SqlCommand cmd = new SqlCommand("Insert INTO Personalinfo(StudentName,StudentClass,StudentRollNo)values('" + TextBox1.Text + "','" + TextBox2.Text + "','" + TextBox3.Text + "')", con);
con.Open();
cmd.ExecuteNonQuery();
Label4.Text = "Data Is Stored";
}
catch (Exception ex)
{
Label4.Text = ex.Message;
}
}
}
For Update -->
protected void Button_Update(object sender, EventArgs e){
using(SqlConnection con = new SqlConnection(conn))
{
using(SqlCommand cmd = new SqlCommand())
{
cmd.Connection = con;
cmd.CommandText = "UPDATE Personalinfo SET StudentName = #1 ... WHERE Student_Id= #N";
cmd.Parameters.Add("#1",SqlDbType.NVarChar).Value = your_value;
cmd.Para.....
cmd.Parameters.Add("#N",.....).Value = your_student_id;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
For Delete -->>
protected void Button_Delete(object sender, EventArgs e){
using(SqlConnection con = new SqlConnection(conn))
{
using(SqlCommand cmd = new SqlCommand())
{
cmd.Connection = con;
cmd.CommandText = "DELETE FROM Personalinfo WHERE StudentName = '"+TextBox1.Text+"'";
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
After every event of button you can make a BindGrid ... to refresh your data from data grid... in BindGrid method you need to remake the select method you just did ... if you have issue tell me