Develop Reference

How Can I get the value in the gridview footer row of textbox and dropdownlist in asp.net c# webform

I want to get what I write in the textbox but always get the "" string. I can't find the value when I type something else into the textboxT_T.
Here is the Gridview code:
<div style="margin:0 auto;width:900px;">
<asp:Label ID="USER_header" runat="server"
Text="一.先新增用戶" CssClass="=text-center"></asp:Label>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" ShowFooter = "true" Width="900" OnDataBound = "OnDataBound" OnRowCommand="GridView1_RowCommand">
<Columns>
<asp:TemplateField HeaderText="工號" SortExpression="BS_ID">
<ItemTemplate>
<asp:Label ID="lblBSID" runat="server"
Text='<%# Eval("BS_ID") %>'/>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="BS_ID_tb" runat="server"/>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="中文姓名" SortExpression="BS_NAME_CHT">
<ItemTemplate>
<asp:Label ID="lblBS_NAME_CHT" runat="server"
Text='<%# Eval("BS_NAME_CHT") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="BS_NAME_CHT_tb" runat="server"></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="英文姓名" SortExpression="BS_NAME_ENG">
<ItemTemplate>
<asp:Label ID="lblBS_NAME_ENG" runat="server"
Text='<%# Eval("BS_NAME_ENG") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="BS_NAME_ENG_tb" runat="server" ></asp:TextBox>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="部門" SortExpression="BS_DEPT">
<ItemTemplate>
<asp:Label ID="lblBS_DEPT" runat="server"
Text='<%# Eval("BS_DEPT") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="DropDownList1" Width="200" runat="server">
</asp:DropDownList>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField>
<FooterTemplate>
<asp:LinkButton ID="btnInsert" runat="server"
onclick="lbInsert_Click" Text="新增" CommandName="Insert"></asp:LinkButton>
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>`
Here is the complete code:
private DataSet _dataSet;
private DataSet _dataSetHKTEL;
private DataSet _datasetHKMOBILE;
private string _value;
protected void Page_Load(object sender, EventArgs e)
{
ShowData();
GridView1.FooterRow.Visible = false;
lblinsertuser.Visible = false;
lbCancelSave.Visible = false;
//if (Session["key_pass"] == null)
//{
// Response.Write("<script>alert('YOUR ACCESS DENY! 你沒有權限進入此頁面');location.href='Default.aspx';</script>");
//}
}
private void Viewtable()
{
using (SqlConnection conn = new SqlConnection(this._connectionString))
{
string query = "SELECT TOP 2 BS_ID,BS_NAME_CHT,BS_NAME_ENG,BS_DEPT FROM BS_USER ORDER BY 1 DESC ";
SqlCommand cmd = new SqlCommand(query, conn);
SqlDataAdapter da1 = new SqlDataAdapter(cmd);
DataTable finaldata = this.GenerateDataTable();
conn.Open();
da1.Fill(finaldata);
this._dataSet = new DataSet();
this._dataSet.Tables.Add(finaldata);
conn.Close();
da1.Dispose();
}
}
private void ViewItnlHKTel()
{
using (SqlConnection conn = new SqlConnection(this._connectionString))
{
string query = "SELECT TOP 2 DA_TEL_NO,DA_USER FROM DA_ITNL_HK_TEL ORDER BY 1 DESC ";
SqlCommand cmd = new SqlCommand(query, conn);
SqlDataAdapter da1 = new SqlDataAdapter(cmd);
DataTable finaldata = this.GenerateTable();
conn.Open();
da1.Fill(finaldata);
this._dataSetHKTEL = new DataSet();
this._dataSetHKTEL.Tables.Add(finaldata);
conn.Close();
da1.Dispose();
}
}
private void ViewITNLHKMOBILE()
{
using (SqlConnection conn = new SqlConnection(this._connectionString))
{
string query = "SELECT TOP 2 DA_PHONE_NO,DA_USER FROM DA_HK_MOBILE ORDER BY 1 DESC ";
SqlCommand cmd = new SqlCommand(query, conn);
SqlDataAdapter da1 = new SqlDataAdapter(cmd);
DataTable finaldata = this.GenerateMOBILE_HK();
conn.Open();
da1.Fill(finaldata);
this._datasetHKMOBILE = new DataSet();
this._datasetHKMOBILE.Tables.Add(finaldata);
conn.Close();
da1.Dispose();
}
}
private DataTable GenerateDataTable()
{
DataTable table = new DataTable();
table.Columns.Add("BS_ID", typeof(string));
table.Columns.Add("BS_NAME_CHT", typeof(string));
table.Columns.Add("BS_NAME_ENG", typeof(string));
table.Columns.Add("BS_DEPT", typeof(string));
return table;
}
private DataTable GenerateTable()
{
DataTable table = new DataTable();
table.Columns.Add("DA_USER", typeof(string));
table.Columns.Add("DA_ITNL_HK_TEL", typeof(string));
return table;
}
private DataTable GenerateMOBILE_HK()
{
DataTable table = new DataTable();
table.Columns.Add("DA_USER", typeof(string));
table.Columns.Add("DA_PHONE_NO", typeof(string));
return table;
}
private void ShowData()
{
Viewtable();
GridView1.DataSource = this._dataSet;
GridView1.DataBind();
ViewItnlHKTel();
ADD_HK_TEL.DataSource = this._dataSetHKTEL;
ADD_HK_TEL.DataBind();
ViewITNLHKMOBILE();
ADD_HK_MOBILE.DataSource = this._datasetHKMOBILE;
ADD_HK_MOBILE.DataBind();
}
protected void lbladd_Click(object sender, EventArgs e)
{
//TextBox id = GridView1.FooterRow.FindControl("BS_ID_tb") as TextBox;
////string strBS_ID = (GridView1.FooterRow.FindControl("BS_ID_tb") as TextBox).Text;
//DropDownList DEPT_ddl = GridView1.FooterRow.FindControl("DropDownList1") as DropDownList;
////string strBS_ID = BS_ID_tb.Text;
////string strBS_NAME_CHT = BS_NAME_CHT_tb.Text;
////string strBS_NAME_ENG = BS_NAME_ENG.Text;
//string strBS_DEPT = DEPT_ddl.SelectedItem.Value;
////using (SqlConnection conn = new SqlConnection(this._connectionString))
////{
//// string query = "INSERT INTO BS_USER(BS_ID , BS_NAME_CHT , BS_NAME_ENG , BS_DEPT) VALUES (#BS_ID , #BS_NAME_CHT , #BS_NAME_ENG , #BS_DEPT)";
//// SqlCommand cmd = new SqlCommand(query, conn);
//// cmd.Parameters.Clear();
//// cmd.Parameters.AddWithValue("#BS_ID", strBS_ID);
//// cmd.Parameters.AddWithValue("#BS_NAME_CHT", strBS_NAME_CHT);
//// cmd.Parameters.AddWithValue("#BS_NAME_ENG", strBS_NAME_ENG);
//// cmd.Parameters.AddWithValue("#BS_DEPT", strBS_DEPT);
//// conn.Open();
//// cmd.ExecuteReader();
//// conn.Close();
//// //Response.Redirect("");
////}
}
protected void lbInsert_Click(object sender, EventArgs e)
{
GridView1.FooterRow.Visible = true;
lblinsertuser.Visible = true;
lbCancelSave.Visible = true;
lbInsert.Visible = false;
}
protected void lbCancelSave_Click(object sender, EventArgs e)
{
GridView1.FooterRow.Visible = false;
lbInsert.Visible = true;
}
DataTable Selectindex()
{
DataTable dt = new DataTable();
try
{
using (SqlConnection conn = new SqlConnection(this._connectionString))
{
using (SqlCommand cmd = new SqlCommand("SELECT '請選擇部門' AS BS_NAME , '000' AS BS_ID UNION SELECT BS_NAME , BS_ID FROM BS_DEPT ORDER BY BS_ID ASC", conn))
{
conn.Open();
SqlDataAdapter sda = new SqlDataAdapter(cmd);
sda.Fill(dt);
}
}
}
catch (SqlException exc)
{
ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + exc.Message + "');", true);
}
catch (Exception exc)
{
ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + exc.Message + "');", true);
}
finally
{
}
return dt;
}
protected void OnDataBound(object sender, EventArgs e)
{
DropDownList DEPT_ddl = GridView1.FooterRow.FindControl("DropDownList1") as DropDownList;
DEPT_ddl.DataSource = Selectindex();
DEPT_ddl.DataTextField = "BS_NAME";
DEPT_ddl.DataValueField = "BS_ID";
DEPT_ddl.DataBind();
}
protected void lbSave_Click(object sender, EventArgs e)
{
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName.Equals("Insert",StringComparison.OrdinalIgnoreCase))
{
GridView GridView1= (GridView)sender;
TextBox BS_ID_tb = (TextBox)GridView1.FooterRow.FindControl("BS_ID_tb");
string str_BS_ID = BS_ID_tb.Text;
TextBox BS_NAME_CHT_tb = (TextBox)GridView1.FooterRow.FindControl("BS_NAME_CHT_tb");
string str_BS_NAME_CHT = BS_NAME_CHT_tb.Text;
TextBox BS_NAME_ENG_tb = (TextBox)GridView1.FooterRow.FindControl("BS_NAME_ENG_tb");
string str_BS_NAME_ENG_tb = BS_NAME_ENG_tb.Text;
DropDownList DEPT_ddl = (DropDownList)GridView1.FooterRow.FindControl("DropDownList1");
string str_DEPT_value = DEPT_ddl.SelectedItem.Value;
InsertData(str_BS_ID, str_BS_NAME_CHT, str_BS_NAME_ENG_tb, str_DEPT_value);
GridView1.ShowFooter = false;
ShowData();
GridView1.FooterRow.Visible = false;
lblinsertuser.Visible = false;
lbCancelSave.Visible = false;
}
}
private void InsertData(string BS_ID, string BS_NAME_CHT, string BS_NAME_ENG, string BS_DEPT)
{
using (SqlConnection conn = new SqlConnection(this._connectionString))
{
conn.Open();
string sql = String.Format("Insert into BS_USER VALUES('{0}','{1}','{2}','{3}')", BS_ID, BS_NAME_CHT, BS_NAME_ENG, BS_DEPT);
using (SqlCommand cmd = new SqlCommand(sql, conn))
{
cmd.ExecuteNonQuery();
conn.Close();
}
}
}
}
}

View state's purpose is simple:
it's there to persist state across postbacks.
That's why you are getting the initial values like empty strings in the gridview. Setting the property EnableViewState="false" force to get the data by rebinding the control, not from the viewstate. To understand view state more, see here.

asp.net c# send ArrayList to gridview not displaying items

I have 3 dropdownlist: select year, select make, select model. Upon select model the results should appear in a gridview. My tables are:
Makes with [(pk)MakeID, MakeName]; Models with [(pk)ModelID, Make_ID, ModelYear, ModelName]; and Wipers with [(pk)WiperID, Model_ID, Description, Emplacement, Price]. When I step through debug, I see 6 counts of records found, but I do not see it in gridview
I've looked at these for help, but no answers
ASP.net DropDownList populates GridView
Binding gridview with arraylist asp.net/c#
My Default.aspx
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<div id="wrapper" align="center">
<asp:DropDownList ID="ddlYear" runat="server"
AutoPostBack="true" OnSelectedIndexChanged="Year_Changed">
</asp:DropDownList>
<asp:DropDownList ID="ddlMake" runat="server"
AutoPostBack="true" OnSelectedIndexChanged="Make_Changed">
</asp:DropDownList>
<asp:DropDownList ID="ddlModel" runat="server"
AutoPostBack="true"
OnSelectedIndexChanged="Get_Wipers_By_Model">
</asp:DropDownList>
</div>
</ContentTemplate>
</asp:UpdatePanel>
<asp:GridView ID="grdWiperList" runat="server">
</asp:GridView>
</form>
My Default.aspx.cs
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//Year drop down list is populated on page load
string query = "SELECT DISTINCT ModelYear FROM Models";
string connectionString = ConfigurationManager.ConnectionStrings["wiperConnectionString"].ToString();
SqlCommand cmd = new SqlCommand(query);
using (SqlConnection conn = new SqlConnection(connectionString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = conn;
conn.Open();
ddlYear.DataSource = cmd.ExecuteReader();
ddlYear.DataValueField = "ModelYear";
ddlYear.DataBind();
conn.Close();
}
}
ddlYear.Items.Insert(0, new ListItem("Select Year", "0"));
ddlMake.Enabled = false;
ddlModel.Enabled = false;
ddlMake.Items.Insert(0, new ListItem("Select Make", "0"));
ddlModel.Items.Insert(0, new ListItem("Select Model", "0"));
}
}
private void BindDropDownList(DropDownList ddl, string query, string text, string value, string defaultText)
{
string connectionString = ConfigurationManager.ConnectionStrings["wiperConnectionString"].ToString();
SqlCommand cmd = new SqlCommand(query);
using (SqlConnection conn = new SqlConnection(connectionString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = conn;
conn.Open();
ddl.DataSource = cmd.ExecuteReader();
ddl.DataTextField = text;
ddl.DataValueField = value;
ddl.DataBind();
conn.Close();
}
}
ddl.Items.Insert(0, new ListItem(defaultText, "0"));
}
protected void Year_Changed(object sender, EventArgs e)
{
//the Makes drop down list is populated on OnSelectedIndexChange event of the Year_Changed event
ddlMake.Enabled = false;
ddlModel.Enabled = false;
ddlMake.Items.Clear();
ddlModel.Items.Clear();
ddlMake.Items.Insert(0, new ListItem("Select Make", "0"));
ddlModel.Items.Insert(0, new ListItem("Select Model", "0"));
int yearId = int.Parse(ddlYear.SelectedItem.Value);
if (yearId > 0)
{
string query = string.Format("SELECT DISTINCT MakeID, MakeName FROM Makes JOIN Models ON Make_ID = MakeID WHERE ModelYear = {0}", yearId);
BindDropDownList(ddlMake, query, "MakeName", "MakeID", "Select Make");
ddlMake.Enabled = true;
}
}
protected void Make_Changed(object sender, EventArgs e)
{
ddlModel.Enabled = false;
ddlModel.Items.Clear();
ddlModel.Items.Insert(0, new ListItem("Select Model", "0"));
int yearID = int.Parse(ddlYear.SelectedItem.Value);
int makeId = int.Parse(ddlMake.SelectedItem.Value);
if (makeId > 0)
{
string query = string.Format("SELECT ModelID, ModelName FROM Models WHERE ModelYear = {0} AND Make_ID = {1}", yearID, makeId);
BindDropDownList(ddlModel, query, "ModelName", "ModelID", "Select Model");
ddlModel.Enabled = true;
}
}
protected void Get_Wipers_By_Model(object sender, EventArgs e)
{
grdWiperList.DataSource = Connection.GetWipersByModel
(!IsPostBack ? "%" : ddlModel.SelectedValue);
grdWiperList.DataBind();
}
}
My Connection.cs
public static ArrayList GetWipersByModel(string modelType)
{
ArrayList listResults = new ArrayList();
string query = string.Format
("SELECT * FROM Wipers WHERE Model_ID LIKE '{0}'", modelType);
try
{
conn.Open();
cmd.Connection = conn;
cmd.CommandText = query;
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
int wiperID = reader.GetInt32(0);
int model_id = reader.GetInt32(1);
string description = reader.GetString(2);
string itemNo = reader.GetString(3);
string emplacement = reader.GetString(4);
decimal price = reader.GetDecimal(5);
Wipers wipers = new Wipers(wiperID, model_id, description, itemNo, emplacement, price);
listResults.Add(wipers);
}
}
finally
{
conn.Close();
}
return listResults;
}

I think this because the updatePanel control try to add trigger between UpdatePanel control and DropDownList Control

How to filter query in asp.net using dropdown list?

i am using sql query to fetch the data from one dropdown list and want to change the second dropdown list by filter data i mean i am selecting the 1st dropdown list and the 2nd drop downlist show all the customer but i want the specific customer by cardcode when i select cardcode.
kindly help, thanks in advance
here is my aspx.cs code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
namespace StackOver
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
LoadOptions();
}
}
protected void LoadOptions()
{
DataTable CardCode = new DataTable();
string id, name, newName, name2;
SqlConnection connection = new SqlConnection("Data Source=adfsadf;Initial Catalog=TestDatabse;Persist Security Info=True;User ID=asd;Password=asdf");
using (connection)
{
SqlDataAdapter adapter = new SqlDataAdapter("SELECT T1.CardCode , T1.CardName, T2.OpprId,T1.CntctPrsn, T2.CprCode,T2.MaxSumLoc FROM OCRD T1 left join OOPR T2 on T1.CardCode=T2.CardCode" , connection);
adapter.Fill(CardCode);
if (CardCode.Rows.Count > 0)
{
for (int i = 0; i < CardCode.Rows.Count; i++)
{
id = CardCode.Rows[i]["CardCode"].ToString();
name = CardCode.Rows[i]["CardName"].ToString();
newName = id + " ---- " + name;
//name2 = id;
DropDownList1.Items.Add(new ListItem(newName, id));
name2 = CardCode.Rows[i]["CntctPrsn"].ToString();
DropDownList2.Items.Add(new ListItem(name2, name2));
}
}
//adapter.Fill(CardCode);
//DropDownList1.DataValueField = "CardCode";
//DropDownList1.DataTextField = "CardCode";
//DropDownList1.DataBind();
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string selected = DropDownList1.SelectedItem.Value;
SqlConnection connection = new SqlConnection("Data Source=mydtasrc;Initial Catalog=TestDatabs;Persist Security Info=True;User ID=asf;Password=asdfgh");
using (connection)
{
// SqlCommand theCommand = new SqlCommand("SELECT CardCode, CardName, OpprId, CprCode,MaxSumLoc FROM OOPR WHERE CardCode = #CardCode", connection);
SqlCommand theCommand = new SqlCommand("SELECT T1.CardCode , T1.CardName, T2.OpprId, T1.CntctPrsn,T2.CprCode FROM OCRD T1 left join OOPR T2 on T1.CardCode=T2.CardCode where T1.CardCode=#CardCode", connection);
connection.Open();
theCommand.Parameters.AddWithValue("#CardCode", selected);
theCommand.CommandType = CommandType.Text;
SqlDataReader theReader = theCommand.ExecuteReader();
if (theReader.Read())
{
// Get the first row
// theReader.Read();
// Set the text box values
this.TextBox1.Text = theReader["CardCode"].ToString();
this.TextBox2.Text = theReader["CardName"].ToString();
this.TextBox5.Text = theReader["CprCode"].ToString();
this.TextBox3.Text = theReader["OpprId"].ToString();
this.DropDownList2.Text = theReader["CntctPrsn"].ToString();
// this.TextBox3 = reader.IsDBNull(TextBox3Index) ? null : reader.GetInt32(TextBox3Index)
// GenreID = reader.IsDBNull(genreIDIndex) ? null : reader.GetInt32(genreIDIndex)
// this.TextBox4.Text = theReader.GetString(3);
// TextBox5.Text = theReader.GetString(4);
// TextBox6.Text = theReader.GetString(5);
// TextBox7.Text = theReader.GetString(6);
}
connection.Close();
}
}
public object TextBox3Index { get; set; }
// protected void Button1_Click(object sender, EventArgs e)
// {
// SqlConnection connection = new SqlConnection();
// connection.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["TestDataBaseConnectionString2"].ConnectionString;
// connection.Open();
// SqlCommand cmd = new SqlCommand();
// cmd.CommandText = "select * from OOPR";
// cmd.Connection = connection;
// SqlDataAdapter da = new SqlDataAdapter();
// da.SelectCommand = cmd;
// DataSet ds = new DataSet();
// da.Fill(ds, " OOPR");
// SqlCommandBuilder cb = new SqlCommandBuilder(da);
// DataRow drow = ds.Tables["OOPR"].NewRow();
// drow["CardCode"] = TextBox1.Text;
// drow["CardName"] = TextBox2.Text;
// drow["OpprId"] = TextBox3.Text;
// drow["CprCode"] = TextBox4.Text;
// drow["MaxSumLoc"] = TextBox5.Text;
// ds.Tables["OOPR"].Rows.Add(drow);
// da.Update(ds, " OOPR ");
// string script = #"<script language=""javascript"">
// alert('Information have been Saved Successfully.......!!!!!.');
// </script>;";
// Page.ClientScript.RegisterStartupScript(this.GetType(), "myJScript1", script);
// }
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection connection = new SqlConnection("Data Source=192.168.0.65;Initial Catalog=TestDataBase;Persist Security Info=True;User ID=sa;Password=mushko");
using (connection)
{
// connection.Open();
SqlCommand insert = new SqlCommand("Insert into OOPR(CardCode, CardName, OpprId, CprCode,MaxSumLoc) values (#TextBox1,#TextBox2,#TextBox3,#TextBox4,#TextBox5 )", connection); //('" + TextBox1.Text + "','" + TextBox2.Text + "','" + DropDownList1.Text + "','" + TextBox4.Text + "')", connection);
insert.Parameters.AddWithValue("#TextBox1", TextBox1.Text);
insert.Parameters.AddWithValue("#TextBox2", TextBox2.Text);
insert.Parameters.AddWithValue("#TextBox3", TextBox3.Text);
insert.Parameters.AddWithValue("#TextBox4", TextBox4.Text);
insert.Parameters.AddWithValue("#TextBox5", TextBox4.Text);
connection.Open();
// connection.CommandType=CommandType.Text;
// connection.commandType=CommandType.Text;
// try
// {
insert.ExecuteNonQuery();
connection.Close();
// }
//catch
//{
// TextBox5.Text = "Error when saving on database";
// connection.Close();
//}
//TextBox1.Text="";
//TextBox2.Text = "";
//TextBox3.Text = "";
//TextBox4.Text="";
}
}
protected void Button2_Click(object sender, EventArgs e)
{
this.ClientScript.RegisterClientScriptBlock(this.GetType(), "Close", "window.close()", true);
// this.close();
}
protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
}
and here is the apsx code
<%# Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="StackOver._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Welcome to ASP.NET!
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
<asp:DropDownList ID="DropDownList2" runat="server"
onselectedindexchanged="DropDownList2_SelectedIndexChanged">
</asp:DropDownList>
</h2>
<br />
<p>
Business Partner Code :
<asp:TextBox ID="TextBox1" runat="server" Width="192px" ></asp:TextBox>
</p>
<p>
Business Partner Name :
<asp:TextBox ID="TextBox2" runat="server" Width="192px" ></asp:TextBox>
</p>
<p>
Opportunity No. :
<asp:TextBox ID="TextBox3" runat="server" Width="196px" ></asp:TextBox>
</p>
<p>
Contact Person Name :
<asp:TextBox ID="TextBox4" runat="server" Width="196px" ></asp:TextBox>
</p>
<p>
Total Amount Invoiced:
<asp:TextBox ID="TextBox5" runat="server" Width="193px" ></asp:TextBox>
</p>
<p>
Business partner Territory:
<asp:TextBox ID="TextBox6" runat="server" Width="174px" ></asp:TextBox>
</p>
<p>
Sales Employee:
<asp:TextBox ID="TextBox7" runat="server" Width="235px" ></asp:TextBox>
</p>
<p>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Add"
Width="140px" />
<asp:Button ID="Button2" runat="server" Text="Cancel" Width="149px"
onclick="Button2_Click" />
</p>
</asp:Content>

Put your filtered customer into a DataTable(dt) and fill like this:
DropDownList2.DataTextField = "CustomerName";
DropDownList2.DataValueField = "CustomerID";
DropDownList2.DataSource = dt;
DropDownList2.DataBind();

The list2 will change its value once the list1 trigger the selectedindexchanged event.
protected void LoadOptions()
{
DataTable CardCode = new DataTable();
string id, name, newName, name2;
SqlConnection connection = new SqlConnection("Data Source=adfsadf;Initial Catalog=TestDatabse;Persist Security Info=True;User ID=asd;Password=asdf");
using (connection)
{
SqlDataAdapter adapter = new SqlDataAdapter("SELECT T1.CardCode , T1.CardName, T2.OpprId,T1.CntctPrsn, T2.CprCode,T2.MaxSumLoc FROM OCRD T1 left join OOPR T2 on T1.CardCode=T2.CardCode" , connection);
adapter.Fill(CardCode);
if (CardCode.Rows.Count > 0)
{
for (int i = 0; i < CardCode.Rows.Count; i++)
{
id = CardCode.Rows[i]["CardCode"].ToString();
name = CardCode.Rows[i]["CardName"].ToString();
newName = id + " ---- " + name;
//name2 = id;
DropDownList1.Items.Add(new ListItem(newName, id));
//*******HERE*****//
DropDownList2.DataSource = CardCode;
DropDownList2.DataBind();
DropDownList2.DataValueField = "CardCode";
DropDownList2.DataTextField = "CntctPrsn";
//*******HERE*****//
}
}
}
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string selected = DropDownList1.SelectedItem.Value;
SqlConnection connection = new SqlConnection("Data Source=mydtasrc;Initial Catalog=TestDatabs;Persist Security Info=True;User ID=asf;Password=asdfgh");
using (connection)
{
// SqlCommand theCommand = new SqlCommand("SELECT CardCode, CardName, OpprId, CprCode,MaxSumLoc FROM OOPR WHERE CardCode = #CardCode", connection);
SqlCommand theCommand = new SqlCommand("SELECT T1.CardCode , T1.CardName, T2.OpprId, T1.CntctPrsn,T2.CprCode FROM OCRD T1 left join OOPR T2 on T1.CardCode=T2.CardCode where T1.CardCode=#CardCode", connection);
connection.Open();
theCommand.Parameters.AddWithValue("#CardCode", selected);
theCommand.CommandType = CommandType.Text;
SqlDataReader theReader = theCommand.ExecuteReader();
if (theReader.Read())
{
this.TextBox1.Text = theReader["CardCode"].ToString();
this.TextBox2.Text = theReader["CardName"].ToString();
this.TextBox5.Text = theReader["CprCode"].ToString();
this.TextBox3.Text = theReader["OpprId"].ToString();
//*******AND HERE*****//
this.DropDownList2.SelectedValue = selected;
//*******AND HERE*****//
}
connection.Close();
}
}

How to hide or make it visible based on the condition given in the TextChanged event of the Textbox?

I am having a textbox on my web form. Within this textbox I am using Jquery Auto Complete. I have taken two labels on my web form and trying to hide this label based on the condition I have given in the TextChanged event of the Textbox. But I am not able display the visible one.
This is my aspx page-
<link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
<script type="text/javascript">
$(function () {
var items=[<%=autotag %>];
$("#TextBox1").autocomplete({
source:items
});
});
</script>
<table>
<tr>
<td>Name:</td>
<td>
<asp:TextBox ID="TextBox1" runat="server" ontextchanged="TextBox1_TextChanged1"
AutoPostBack="True"></asp:TextBox></td>
</tr>
<tr><td colspan="2">
<asp:Panel ID="Panel1" runat="server" Visible="False">
<asp:Label ID="Label1" runat="server" Text=""></asp:Label>
<br />
<asp:Label ID="Label2" runat="server" Text=""></asp:Label></asp:Panel>
</td></tr>
</table>
My cs page-
public string autotag="";
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack == false)
{
bind1();
}
}
//This bind1() is for autocomplete.
public void bind1()
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnection"].ConnectionString);
con.Open();
string query="select name from tbl_data_show";
SqlCommand cmd=new SqlCommand(query,con);
SqlDataReader dr=cmd.ExecuteReader();
dr.Read();
while(dr.Read())
{
if(string.IsNullOrEmpty(autotag))
{
autotag+="\""+dr["name"].ToString()+"\"";
}
else
{
autotag+=", \""+dr["name"].ToString()+"\"";
}
}
}
protected void TextBox1_TextChanged1(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnection"].ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("select name from tbl_data_show where name='"+TextBox1.Text+"'", con);
//DataTable dt1 = new DataTable();
//SqlDataAdapter da = new SqlDataAdapter(cmd);
//da.Fill(dt1);
SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
Panel1.Visible = true;
}
}
else
{
Panel1.Visible = false;
}
con.Close();
}
Please guide me where I am doing wrong?

If am not wrong, please try by setting autopostback = true, change your asp tag line like this,
<asp:TextBox ID="TextBox1" runat="server" ontextchanged="TextBox1_TextChanged1" AutoPostBack="True"></asp:TextBox>
Update
Try your coding in this way,
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack == false)
{
bind1();
//Panel1.Visible = true;
}
}
protected void TextBox1_TextChanged1(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("select name from tbl_data_show where name='"+TextBox1.Text+"'", con);
// DataTable dt1 = new DataTable();
// SqlDataAdapter da = new SqlDataAdapter(cmd);
// da.Fill(dt1);
SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
Panel1.Visible = true;
//if (dt1.Rows.Count > 0)
//{
// if (TextBox1.Text == dr.GetString(0))
// {
// //Label1.Text = "4";
// //Label2.Text = "5";
// Panel1.Visible=true;
// //Label1.Visible = true;
// //Label2.Visible = false;
// }
// else
// {
// //Label2.Text = "5";
// Panel1.Visible = false;
// //Label2.Visible = true;
// //Label1.Visible = false;
// }
//}
}
}
else
{
Panel1.Visible = false;
}
con.Close();
}
Let me know, if you get struggle with this again.
Autocomplete Using Ajax :
Initially download ajaxcontrolkit from this link, and then add into your project using this link and then add this line into your source page (below to <%# page>)
<%# Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
aspx :
<asp:TextBox ID="TextBox1" runat="server" ontextchanged="TextBox1_TextChanged1"
AutoPostBack="True"></asp:TextBox>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:AutoCompleteExtender ServiceMethod="SearchCustomers"
MinimumPrefixLength="1"
CompletionInterval="100" EnableCaching="false" CompletionSetCount="10"
TargetControlID="TextBox1"
ID="AutoCompleteExtender1" runat="server" FirstRowSelected = "false">
Code Behind :
protected void Page_Load(object sender, EventArgs e)
{
//bind1();
}
[System.Web.Script.Services.ScriptMethod()]
[System.Web.Services.WebMethod]
public static List<string> SearchCustomers(string prefixText, int count)
{
using (SqlConnection conn = new SqlConnection())
{
conn.ConnectionString = ConfigurationManager
.ConnectionStrings["conn"].ConnectionString;
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select name from tbl_data_show where " +
"name like #SearchText + '%'";
cmd.Parameters.AddWithValue("#SearchText", prefixText);
cmd.Connection = conn;
conn.Open();
List<string> customers = new List<string>();
using (SqlDataReader sdr = cmd.ExecuteReader())
{
while (sdr.Read())
{
customers.Add(sdr["name"].ToString());
}
}
conn.Close();
return customers;
}
}
}

if you are not setting Lable visibility false anywhere else, try this
protected void TextBox1_TextChanged1(object sender, EventArgs e)
{
dt = g1.return_dt("select name from tbl_data_show");
if (dt.Rows.Count > 0)
{
if (TextBox1.Text == dt.Rows[0]["name"])
{
Label1.Text = "4";
Label1.Visible = true;
}
else if (TextBox1.Text != dt.Rows[0]["name"])
{
Label2.Text = "5";
Label2.Visible = true;
}
else
{
Label1.Visible = false;
Label2.Visible = false;
}
}
}

Binding sqldatareader to gridview c#

I am creating an application for a asp.net class that I am taking. One of the pages in the application needs to allow a user to search for a specific student via last name or user ID. When the student is found the page should display the students data and his/her class schedule.
I have gotten everything to work except for the class schedule. The approach I have taken (as we learned in class) was to get the query results via the SqlDataReader and bind it to a GridView. This is done in showStudentSchedule().
The query in this function returns the correct results when I test it against the DB I created, but the grid view displaying a students schedule doesn't show up on the page.
//StudentInformation.aspx
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="StudentInformation.aspx.cs" Inherits="StudentInformation" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<p>
<asp:Label ID="Label6" runat="server" Text="Search by Last Name: "></asp:Label>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
<asp:DropDownList ID="DropDownList1" runat="server"
onselectedindexchanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True">
</asp:DropDownList>
</p>
<asp:Label ID="Label1" runat="server"></asp:Label>
<br />
<asp:Label ID="Label2" runat="server"></asp:Label>
<br />
<asp:Label ID="Label3" runat="server"></asp:Label>
<br />
<asp:Label ID="Label4" runat="server"></asp:Label>
<br />
<asp:Label ID="Label5" runat="server"></asp:Label>
<asp:Panel ID="Panel1" runat="server">
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</asp:Panel>
</asp:Content>
//StudentInformation.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
public partial class StudentInformation : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
string userStr = TextBox1.Text;
int userInt;
bool isNum = int.TryParse(userStr, out userInt);
string sqlSelectFindUserByName;
if (isNum)
sqlSelectFindUserByName = string.Format("SELECT LastName FROM Personal_Info JOIN Students ON Personal_Info.ID = Students.Student_ID WHERE Personal_Info.ID = '{0}'", userInt);
else
sqlSelectFindUserByName = string.Format("SELECT LastName FROM Personal_Info JOIN Students ON Personal_Info.ID = Students.Student_ID WHERE Personal_Info.LastName LIKE '%{0}%'", userStr);
SqlConnection connection = new SqlConnection();
connection.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand commandFindUserByName = new SqlCommand(sqlSelectFindUserByName, connection);
connection.Open();
SqlDataReader readerFindUserByName = commandFindUserByName.ExecuteReader();
DropDownList1.Items.Clear();
DropDownList1.Items.Add("Please make a selection");
while (readerFindUserByName.Read())
DropDownList1.Items.Add(readerFindUserByName["LastName"].ToString());
if (DropDownList1.Items.Count == 2)
DropDownList1.SelectedIndex = 1;
DropDownList1_SelectedIndexChanged(null, null);
connection.Close();
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string nameLast = DropDownList1.SelectedItem.Value;
displayStudent(nameLast);
}
private void displayStudent(String nameLast)
{
clearStudentLabel();
int userInt;
bool isNum = int.TryParse(nameLast, out userInt);
SqlConnection connection = new SqlConnection();
connection.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string sqlSelectFindUserInfoByName;
sqlSelectFindUserInfoByName = string.Format("SELECT ID, FirstName, LastName, City, Phone FROM Personal_Info WHERE LastName LIKE '%{0}%'", nameLast);
SqlCommand commandFindUserInfo = new SqlCommand(sqlSelectFindUserInfoByName, connection);
connection.Open();
SqlDataReader readerFindUserInfo = commandFindUserInfo.ExecuteReader();
int i = 0;
while (readerFindUserInfo.Read())
{
Label1.Text = "Student ID: " + readerFindUserInfo["ID"].ToString();
Label2.Text = "First name: " + readerFindUserInfo["FirstName"].ToString();
Label3.Text = "Last name: " + readerFindUserInfo["LastName"].ToString();
Label4.Text = "City: " + readerFindUserInfo["City"].ToString();
Label5.Text = "Phone: " + readerFindUserInfo["Phone"].ToString();
}
connection.Close();
showStudentSchedule(userInt);
}
private void showStudentSchedule(int id)
{
SqlConnection connection = new SqlConnection();
connection.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string sqlSelectFindUserInfoByName = string.Format("SELECT Class_Schedule.Section_ID, Class_Schedule.Course_ID, Class_Schedule.Days, Class_Schedule.Time, CASE WHEN Personal_Info.FirstName IS NULL THEN 'Staff' ELSE (Personal_Info.LastName + Personal_Info.FirstName) END AS Name FROM Class_Schedule JOIN Student_Enrollment ON Class_Schedule.Section_ID = Student_Enrollment.Section_ID JOIN Personal_Info ON Class_Schedule.Instructor_ID = Personal_Info.ID WHERE Student_Enrollment.Student_ID = {0}", id);
SqlCommand commandFindUserInfo = new SqlCommand(sqlSelectFindUserInfoByName, connection);
connection.Open();
SqlDataReader readerFindUserInfo = commandFindUserInfo.ExecuteReader();
GridView1.DataSource = readerFindUserInfo;
GridView1.DataBind();
/*
string connectionString = "Data Source=LocalHost;Initial Catalog=Northwind;Persist Security Info=True;User ID=sa;Password=sa_0001";
string commandString = "Select * from Customers";
SqlConnection conn = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand(commandString);
conn.Open();
command.Connection = conn;
SqlDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);
GridView1.DataSource = reader;
GridView1.DataBind();
*/
}
private void clearStudentLabel()
{
Label1.Text = "";
Label2.Text = "";
Label3.Text = "";
Label4.Text = "";
Label5.Text = "";
}
}

Try this out:
SqlConnection connection = new SqlConnection();
connection.ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand command = new SqlCommand(sqlSelectFindUserByName);
connection.Open();
command.Connection = connection;
SqlDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);
GridView1.DataSource = reader;
GridView1.DataBind();