ADO.NET :: Get Two Data In Dropdownlist With Linq?

Nov 20, 2010

[Code]....

I need Two Pieces of data and the DropDownList.

Relationship + SifraId = DropDownList

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[Code]....

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[Code]....

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[Code]....

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[Code]....

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[Code]....

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[URL]

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[Code]....

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[code]...

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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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-venue

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Example

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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");
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adapSel = new SqlDataAdapter(mySQL, conn);
conn.Open();
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adapSel.Fill(dsSel);
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GridView1.DataBind();
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");
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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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Currently,below is my code.

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
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SqlDataAdapter adapSel;
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I receive an error "Incorrect syntax near 'System.Web.UI.WebControls.DropDownList'."

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I am struggling to create a webservice method using LINQ technology and to populate a dropdown in a form. Here is the Webservice code.

[WebMethod]

public
string[] GetAllCountries()
{
LinqClassesDataContext db =
new
LinqClassesDataContext();
var q =
from c
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protectedvoid
Page_Load(object sender,
EventArgs e)
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