How to get the name of the first column present in a table

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I am working on asp.net i have created a webform. I placed 2 dropdownlist controls on it.

1. In the first dropdownlist i saved 4 values(Country,State,District,Region) these four are the table names which present in my sqlserver2008 database.

2. I want to display the first column values(Country_ID or State_ID or District_ID or Region_ID) in the 2nd dropdownlist.
Here the value in 2nd dropdownlist should fill depend upon the selected item in 1st dropdownlist.

Question:-

If i select Country in 1st dropdownlist then the first column(Country_ID)values present in the Country table should fill.
How can i write the query statement to select first column of selected table value in my c# code behind file.

Thanks
Raj

Posted 25-Aug-11 7:37am

Rajjjjjjj

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#realJSOP · Answer 1 · 2011-08-25T07:53:00

Solution 1

This gets the first column in the table (or null if there are no columns).

C#

DataColumn firstColumn = dataTable.Columns.FirstOrDefault();
string name = "UNKNOWN";
if (firstColumn != null)
{
    name = firstColumn.ColumnName;
}

Posted 25-Aug-11 7:53am

#realJSOP

Updated 25-Aug-11 8:11am

v3

prabhatkumartiwari · Answer 2 · 2011-08-25T08:16:00

Solution 2

http://makeadvice.com/blog/?p=148[^]

Posted 25-Aug-11 8:16am

prabhatkumartiwari