Data Controls :: Bind DropDownList Using JavaScript / AJAX And DataTable

Aug 28, 2013

I will get required data from the web method that returns as table!!!

[System.Web.Services.WebMethod]
public static DataTable call(String code)
{
SqlConnection con = new SqlConnection();
SqlCommand cmd = new SqlCommand();

[Code] .....

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I have a Gridview and two link button in that GridView , one link button click is to add edit row ( Edit ), one link button click is to select row ( Select ). I have a dropdownlist inside row which selected when i click link button Select in the gridview edit template, as of my business logic i need to show the dropdownlist only when the user clicks Edit button and when the user clicks Select button . That mean when the user clicks Select button then they clicks Edit button on the gridvview i should allow him to edit the dropdownlist (showing the value to the user through a label).

ASPX CODE

[Code].... C#

When I click Select link button , then I click Edit link button . They have errors : Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index" I don't know what error?. How to fix it

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I have dynamically popute the data in Dropdownlist(Countries) and the On selected index event of Dropdownlist there is noeed to bind /populate the Checkbox list from database depending on the selections made from the Dropdownlist.

For example If I select Gujrata then all the cities of Gujrat should be visible and bounded to the check box list.

2) Once the checkbox list is bounded with data from the database, We need to select  the checkbox from the checkboxlist  and  pass tyhe selected  text of all the  selected checkboxes  fro the checkbox list  as comma seperated  values to database  and then I need to Display in the Grid.

Below is my code for Dynamically populated/Bind DropDown list and get the States:

ASPX:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="MachineCode.aspx.cs" Inherits="SampleApp.MachineCode" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript">

[Code] .....

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Forms Data Controls :: How To Extract Value From A Dropdownlist After Bind 7 Column Name In A Dropdownlist

Mar 29, 2011

I have a table and 7 column name.

I bind the 7 column name in one dropdownlist.

Now the problem is,how do I extract the data value in a dropdownlist?

For example,

Dropdownlist contain 7 column name

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-subject_code

-venue

-time

-seat_no

-admission_no

-subject_id

when I click the subject_name,I want it to appear in a gridview

Example

Math|9.00-10.00|Hall|18|09090J|...

Below is my current codes which I have a problem.

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source= EN\SQLEXPRESS;" + "Initial Catalog=ms;Integrated Security=SSPI");
SqlDataAdapter adapSel;
string mySQL = "SELECT '" + dd_list.SelectedValue+ "' FROM examtimetable ";
adapSel = new SqlDataAdapter(mySQL, conn);
conn.Open();
DataSet dsSel = new DataSet();
adapSel.Fill(dsSel);
GridView1.DataSource = dsSel;
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conn.Close();
}
Previously I have bind 7 column name in my dropdownlist
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == false)
{
SqlConnection conn = new SqlConnection("Data Source= EN\SQLEXPRESS;" + "Initial Catalog=ms;Integrated Security=SSPI");
SqlCommand sqlCmd = new SqlCommand("select column_name from information_schema.columns where table_name='examtimetable' and COLUMN_NAME not like '%ID'", conn);
conn.Open();
SqlDataReader ds;
ds = sqlCmd.ExecuteReader();
dd_list.Items.Clear();
dd_list.DataSource = ds;
dd_list.DataTextField = "Column_Name";
dd_list.DataValueField = "Column_Name";
dd_list.DataBind();
dd_list.Items.Insert(0, "Select Option");
ds.Close();
conn.Close();
}
}

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I have a data table, in one of the column, I will have this data, I will bind the data table to a grid view. I was hoping that this column change to a hyperlink. But, it was display the entire text.

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When I view the page source code, I saw this:

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I had a problem in binding the checkbox list. Here I explain I had a database with 3 columns.

ex:

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And now i have display in my page as like this to checkbox.

seker                                   

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Sep 24, 2010

I need a bit of help with a scenario. I am working on a web application that requires huge amounts of data to be Added, Deleted, and Updated. The data entry forms are divided into logical groups through Multiviews. All the information is saved when the mighty Finish button is pressed. The current setup (previous developer) does not allow me to use transactions. Therefore, if I am to save a new Courier to the database, I need to add his/her Distance and Rate info. In addition, I need to add his/her Banned Areas info (Area Name, Post Code).This is where it gets interesting. Obviously, the DistamceAndRate table and the BannedArea table in my SQL Server will have the CourierID as a foreign key. Since I'm going to save the Courier as well as the Rates and Areas info in one go, I cannot have the newly created CourierID before. Therefore, I cannot bind my Grids for Distance + Rates and Banned Areas directly to database.What I am doing is creating two DataTables and managing them in Viewstate through properties as follow:

[Code]....

So, on page load, the DataTables are initialized with a blank schema. Here are the attempted CRUD implementations (Distance and Rate only):

[Code]....

I am having issues when I am canceling a new entry and when I am editing a new entry. In addition, for Distance and Rates, Rate is acting as unique (cannot be repeated) and attempting to control that is also giving me a headache. I end up creating blank rows.And here's the ASPX cut-out:

[Code]....

Hope to get an answer soon.Also, off-topic, I'm using LINQ here. In order to save a Courier and his/her extra details, I first save his/her address to DB. Then I take the ID of the address and save the courier. now the courier ID is avaliable and i start filling extra tables related with the courier table. If something goes wrong, I have to manually delete created rows. LINQ uses transaction internally but only until a SubmitChanges() call. I'm forced to save each entity so I keep calling SubmitChanges().I tried manual transaction but after saving the address inside a transaction, the Address.OID (Address table's mapped prime-key) had a 0. attempting to use this newly added address while saving Courier in the same transaction threw an exception. If there is a way to get the primary key for entities created in a transaction that is yet to be commited, please mention that'll as well.

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[Code]....

How to bind the dropdownlist to object.Salutation?

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May 26, 2013

I have dropdownlists in register.aspx page

1- ddlzoneE 2-DdlDistrictE

I bind them from database

and when I select item from ddlzoneE ,  ddlDistrictE's Item change below are code

protected void DDLzoneE_SelectedIndexChanged(object sender, EventArgs e)
{
BindDistrictE();
}
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{
DdlDistrictE.Items.Clear()

[Code]......

untill now every thing is ok and when I select Item from ddlzoneE ,DdlDistrict's Item change but when I add below code in Page_load Event it didn't worked

ddlzoneE.Items.FindByText(_dr["zone"].ToString()).Selected = true;
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Forms Data Controls :: How To Use A DropDownList With A DataSource Returning A Datatable

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I am trying to use a datasource with a dropdownlist. Eventually, my data source method to call a stored procedure and load the datatable is returns, but for now, I am just creating the datatable manually. I need each item to have two attributes, the text, whixh the user will see in the DDL, and the value that the program will retrieve from and store back to the file.

It is partly working in that the DDL has 3 items, however the text for each item reads "System.Data.DataRowView"

I have to be close, but I can't figure out what I am doing wrong.

[Code]....

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Forms Data Controls :: Using Array To Bind Dropdownlist

Jul 12, 2010

I have a dropdownlist in datalist. I use arraylist to bind the datalist. In arraylist it is "DataNew" Class which has the property of DataTable "dt_city". Now I bind the DataTable to dropdownlist

Line73: <tr>
Line 74: <td style="width: 100px; height: 24px">
Line 75: <asp:DropDownList ID="DropDownList1" runat="server"
Line 76: SelectedValue='<%# DataBinder.Eval(((DataNew)Container.DataItem).dt_city,"city") %>'>
Line 77: </asp:DropDownList></td>

But I got the error of:
Server Error in '/AFIRS' Application.
DataBinding: 'System.Data.DataTable' does not contain a property with the name 'city'.

Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: DataBinding: 'System.Data.DataTable' does not contain a property with the name 'city'.

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How do I bind all my columns name in my database in a dropdownlist?

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question is same as in thread, but also i would like to see example of this.

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[URL] .I have two dropdownlist which i want to bind from only one xml file like below :

<?xmlversion="1.0"encoding="utf-8" ?>
<WeatherStatus>
<status>

[Code].....

Dropdownlist1 will only bind values of weatherstatus elements and Dropdownlist2 will only bind Windirections element.

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Sep 14, 2010

I have a List<HybridDictionary> _Reasons.

I need to bind the list to a dropdown.

I tried the code as try

{
this.ddlReason.DataSource = _Reasons;
ddlReason.DataValueField = "Key";
ddlReason.DataTextField = "Value";
this.ddlReason.DataBind();
}
catch
{
//Log Entry
}
finally
{
}

But it not work.

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I am handling the row databound event. I need to bind a dropdownlist which is present only in the EditItemTemplate.

So it is throwing:

DropDownList ddlAccountingPeriod = e.Row.FindControl("ddlAccountingPeriod") as DropDownList;
UIControlHelper.BindApprovalPeriod(ddlAccountingPeriod);

this throws a null exception as the dropdown is not present in the ItemTemplate.

Is there a way to check whether it is itemtemplate or edititemtemplate.

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