We Keep Coding

i need get all value in in one column , like my picture , i write foreach loop for that but only respond one record in my column ? what can i do?

DataTable checkbag=(DataTable)Session["bag"];
foreach(DataRow row in checkbag.Rows)
{
if(row["id"].ToString()==e.CommandArgument.ToString()
{
Response.Redirect("mybag.aspx");
break;
}
}

I usually use this. Not sure if answer will be different
foreach(DataRow row in checkbag.AsEnumerable())
{
if(row.Field<string>("id") == e.CommandArgument.ToString())
{
Response.Redirect("mybag.aspx");
break;
}
}

How to access to the content of a DataRow?

I have the following problem.
I have a DataTAble object that represent a single column table, the column is named VulnerabilityReferenceId, something like this:
VulnerabilityReferenceId
167554
167555
167556
167557
167558
167559
167560
167561
So I want create a foreach that access to these row and put the value into a variable
I have done:
foreach (DataRow row in _dt.Rows)
{
Debug.WriteLine("VulnerabilityReferenceId: " );
}
But what can I do to access to the value of the current row and put it into an int variable?

This could be an approach that read the field and convert it to the required datatype.
It requires the reference to DataSetExtension assembly from NET3.5 where you could start to find the DataRowExtensions class
foreach (DataRow row in _dt.Rows)
{
int id = row.Field<int>("VulnerabilityReferenceId");
.....
}
Note: I assume that the field VulnerabilityReferenceId is of type integer

You can use column name as an indexer to get the value as object
foreach (DataRow row in _dt.Rows)
{
int vulRefId=Convert.ToInt32(row["VulnerabilityReferenceId"]);
Debug.WriteLine("VulnerabilityReferenceId: " +vulRefId );
}

Try the below:
for(int i=0;i<_dt.Rows.Count;i++)
{
Debug.WriteLine("VulnerabilityReferenceId: "+dt.Rows[i][0].ToString());
}

foreach (DataRow row in _dt.Rows)
{
String stringVal = row["VulnerabilityReferenceId"].ToString();
int myId = Convert.ToInt32(stringVal);
}

Foreach loop correctly

I have a data table and i'm trying to loop through the rows and create a zipCode array. This issue that i'm only getting one number 4 times. I know I'm doin something wrong but can somebody point this out to me and give and explanation.
Thanks
public string bindMap()
{
using (dal.Sys.RegionTableAdapters.region_countyListTa ta = new Cea.WebApp.JobsEq.Dal.Sys.RegionTableAdapters.region_countyListTa())
{
List<string> code = new List<string>();
dal.Sys.Region.region_countyListDataTable dt = ta.GetData(region.RegionType, region.RegionCode);
foreach (var row in dt)
{
code.Add(region.ZipCode);
}//end foreach loop
string codes = string.Join(",", code.ToArray());
return codes.ToString();
}//end for each loop
}//end bind map

You aren't using the variable that you are iterating with.
foreach (var row in dt)
{
//Not sure how you will get ZipCode from the ROW, but you get the idea.
code.Add(row["ZipCode"]);
}//end foreach loop

As a general desc of the row/cell value, I use this general (NOTE: GENERAL) block:
foreach(var item : items) {
//before adding there is maybe some casting or other work...
listName.add(item["FieldName"]);
}
Understandable is that the listName is of type fieldNameType

iterate through particular column in a datatable

I am Working in asp.net and c#.
I have a datatable in my application with one column.I want to iterate through that column values and check those values with someother value.please tell me how to do that.I tried it with foreach but its not working.
Code:
foreach (DataRow dr in dt.Rows)
{
int code = Convert.ToInt32(dt.Rows[0]["Code"]);
if (code == pcode)
{
//do something
}
else
{ }
}
Note:
dt is my datatable with column code.I want to compare all values in column code with pcode.

int code = Convert.ToInt32(dr["Code"]);
Although you might want to check for NULL also :)

Inside your loop, access dr, instead of dt.Rows[0].

You are always accessing the first row:
dt.Rows[0]["Code"] // use dr instead of dt.Rows[0]
dt is my datatable with column code.I want to compare all values in
column code with pcode.
So am i right when i assume that you want to compare all values with one variable, if all fields equal this value, a bool variable should be true, otherwise false?
You can use Linq:
var allEqual = dt.AsEnumerable()
.All(r => r.Field<int>("Code") == pcode);
Enumerable.All determines whether all elements of a sequence satisfy a condition.

foreach (DataRow dr in dt.Rows)
{
object o = dr["Code"];
if (o != DBNull.Value) // Check for null
{
int code = Convert.ToInt32(o);
if (code == pcode)
{
//do something
}
else
{ }
}
}

2-Column DataTable to List<int> .NET 2.0

I have populated a DataTable from a stored procedure in an older web application written in
C# under .NET 2.0 / Visual Studio 2005.
I'm trying to populate a List with the values in the DataTable, but I keep running up against a couple issues.
My conversion process looks like this:
List<int> SpecialVendorList = new List<int>();
foreach (DataRow datarow in GetAllSpecialVendors().Rows)
{
//Loop through each row
foreach (DataColumn column in GetAllSpecialVendors().Columns)
{
SpecialVendorList.Add(column["ChildVendorId"]);
SpecialVendorList.Add(column["ParentVendorId"]);
}
}
which gives me the following error:
Can not apply indexing with [] to an expression of type 'System.Data.DataColumn'
for each of the SpecialVendorList.Add() methods.

Seems like you're trying to get column values for each row. You only the first foreach loop:
List<int> SpecialVendorList = new List<int>();
try
{
foreach (DataRow datarow in GetAllSpecialVendors().Rows)
{
//Loop through each row
SpecialVendorList.Add(Convert.ToInt32(datarow["ChildVendorId"]));
SpecialVendorList.Add(Convert.ToInt32(datarow["ParentVendorId"]));
}
}
catch(FormatException fe)
{
//handle the error
}
The string index here will get that column's value in that specific row

you need to add the actual values from the rows using the column as the index:
List<int> SpecialVendorList = new List<int>();
foreach (DataRow datarow in GetAllSpecialVendors().Rows)
{
//Loop through each row
foreach (DataColumn column in GetAllSpecialVendors().Columns)
{
int val;
if (int.TryParse(datarow[column].ToString(), out val))
SpecialVendorList.Add(val);
}
}