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how to bind database field to a drop downs?

i'm requesting data from database through a D A L file. I want to data bind and show a drop down menu's single option selected against that of the database. How should i do it?
here's my code:
Pages pg = new Pages();
public static string pgId;
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
Bind_ddlParentPage();
Bind_ddlPageModel();
Bind_ddlArticleModel();
if (!IsPostBack)
{
pgId = Request.QueryString["pageId"];
if (pgId != null)
{
GetData();
}
}
}
}
public void GetData()
{
ddlParentPage.SelectedValue = pg.ParentPage;
//Bind_ddlParentPage();---dropdownlist which is causing problem.
//I want to set this data:: pg.ParentPage to dropdownlist in another
page
ddlPageModel.SelectedValue = pg.PageModel;
//Bind_ddlPageModel();
//All the three drop downs have same table for the source,
'Pages' table and this page is the same page for adding new entry to
Pages table.
ddlArticleModel.SelectedValue = pg.ArticleModel;
//Bind_ddlArticleModel();
}

First, you have a duplication in your conditional statement:
if(!IsPostBack) {
...
if(!IsPostBack) {
...
}
}
Second, you need to bind the data to the dropdown, then set the selected value. Refer: this post
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
DropDownList1.DataBind(); // get the data into the list you can set it
DropDownList1.Items.FindByValue("SOMECREDITPROBLEMS").Selected = true;
}
}

DataGridView records disappear after closing form

I have a datagridview that is not bound to a table in a database. The datagridview is being populated by the contents of a drop down list and a text box on a button click. I want to prevent the records from being deleted everytime I close the form. Is there a way for the records in the datagridview to be saved without having to create a database table?
Below is my code:
private void btnInsert_Click(object sender, EventArgs e)
{
this.dgInsertedInfo.Rows.Add(ddlVendorID.Text, txtDate.Text);
}

You have many options. Here is a simple solution that uses XML serialization.
Note that it makes a few assumptions:
The data all are strings
The DataGridView already has all the columns
To save the other data types you should create a serializable structure!
private void saveButton_Click(object sender, EventArgs e)
{
List<List<string>> data = new List<List<string>>();
foreach(DataGridViewRow row in dgInsertedInfo.Rows)
{
List<string> rowData = new List<string>();
foreach (DataGridViewCell cell in row.Cells)
rowData.Add(cell.FormattedValue.ToString());
data.Add(rowData);
}
XmlSerializer xs = new XmlSerializer(data.GetType());
using (TextWriter tw = new StreamWriter(yourFileName))
{
xs.Serialize(tw, data);
tw.Close();
}
}
private void loadButton_Click(object sender, EventArgs e)
{
List<List<string>> data = new List<List<string>>();
XmlSerializer xs = new XmlSerializer(data.GetType());
using (TextReader tr = new StreamReader(yourFileName))
data = (List<List<string>>) xs.Deserialize(tr);
foreach (List<string> rowData in data)
dgInsertedInfo.Rows.Add(rowData.ToArray());
}

You can write your OWN class and save it as a setting-property.
Class Settings:
namespace MyNamespace
{
public class Settings
{
private ObservableCollection DataGridItemsProp;
public ObservableCollection DataGridItems
{
get { return DataGridItemsProp; }
set { DataGridItemsProp = value; }
}
}
}
Get and save your setting:
//get settings
var datagrid = Properties.Settings.Default.UserSettings;
//save settings
Properties.Settings.Default.UserSettings= datagrid;
Properties.Settings.Default.Save();

ASP.NET C# Edit SqlDataSource record without FormView

How can Edit SqlDataSource record without FormView?
I knows getting data into TextBox, But can't save changes.
protected void Page_Load(object sender, EventArgs e)
{
DataView dvSql = (DataView)EmployData.Select(DataSourceSelectArguments.Empty);
foreach (DataRowView drvSql in dvSql)
{
E_ID.Text = drvSql["ID"].ToString();
E_LName.Text = drvSql["LName"].ToString();
...
}
}
protected void SaveChanges_Click(object sender, EventArgs e)
{
EmployData.UpdateParameters.Add("ID", E_ID);
EmployData.UpdateParameters.Add("LName", E_LName);
....
EmployData.Update();
}
Thank's.

So simple...
Add on Load_Page before read code:
if (Page.IsPostBack)
{ }
else
{
DataView dvSql = (DataView)EmployData.Select(DataSourceSelectArguments.Empty);
....
....
}
Good Day.

ASP.Net Gridview not rebind data on button click

i am new in asp.net i using LINQ with asp.net on button click event my gridview not rebind data and yes gridview is into the updatepanel
'>
'>
protected void btnSave_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvr in gvClientData.Rows)
{
if (((CheckBox)gvr.FindControl("chkdisplay")).Checked == true)
{
string Index = ((Label)gvr.FindControl("lblIndex")).Text;
int GIIndex = Convert.ToInt32(Index);
GI_InsureMaster insertclientinfo = vjdb.GI_InsureMasters.Single(upd => upd.GIMastIndex == GIIndex);
insertclientinfo.SendToCompany = true;
vjdb.SubmitChanges();
}
}
BindAgencyData();
Response.Redirect(Request.RawUrl);
}

It seems you are trying to modify an object and then saving it back to the DB, but you are doing it wrong.
You are querying the object from a different Data Context, vjdb and you are calling SubmitChanges on linqobject. You should call SubmitChanges on vjdb
protected void btnSave_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvr in gvClientData.Rows)
{
if (((CheckBox)gvr.FindControl("chkdisplay")).Checked == true)
{
string Index = ((Label)gvr.FindControl("lblIndex")).Text;
int GIIndex = Convert.ToInt32(Index);
GI_InsureMaster insertclientinfo = vjdb.GI_InsureMasters.Single(upd => upd.GIMastIndex == GIIndex);
insertclientinfo.SendToCompany = true;
vjdb.SubmitChanges(); //HERE
}
}
BindAgencyData();
Response.Redirect(Request.RawUrl);
}
Assuming that BindAgencyData is querying database for latest/updated record and then binding the data to the grid.

Drop Down List make list item requery entitydatasource

My first post here and Iam an absolute beginner. Searched the web for hours. I feel that I might have approached my problem the wrong way, but here goes.
I have a Datasource that displays Loans (assets) in a Gridview.
I would like to have a ddl to filter loans. Like: `If returneddate !=null the items in grid will be free for a new loan.
Selecting ex. "Available assets" in ddl runs a where query on entitydatasource and retrieves the filtered data into grid.
My code: A bit of a mess, several queries that hopefully do the same. I prefer the first one LinqtoEntities
namespace Logsys.Pages
{
public partial class OversiktLån : Page
{
private LogsysEntities context = new LogsysEntities();
protected void Page_Load(object sender, EventArgs e)
{
}
protected EntityDataSource LaanLedig(object sender, EventArgs e)
{
var ledigQuery = from laan in context.Laans
where laan.Returnertdato != null
select laan;
foreach (var laan in ledigQuery)
{
}
}
protected void DDLlaan_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void LaanEntityDataSource_QueryCreated(object sender, QueryCreatedEventArgs e)
{
var laanQuery1 = e.Query.OfType<Laan>();
e.Query = from c in laanQuery1
where (c.Returnertdato != null)
select c;
How to get result of query "into" datasource and make ddl items trigger queries?
KK

protected void ddlLaan_SelectedIndexChanged(object sender, EventArgs e)
{
Int32 ddlvalue = Convert.ToInt32(ddlLaan.SelectedValue);
if (ddlvalue == 1)
{
CLogsysEntities = new LogsysEntities();
var ledig =
from laan in CLogsysEntities.Laans
where laan.Returnertdato != null
select laan;
LaanGridView.DataSourceID = null;
LaanGridView.DataSource = ledig.ToList();
LaanGridView.DataBind();