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How to foreach through a list of datatables?

I have a list of 2 DataTables. I want to iterate through each of them, one at a time. How do I do this? There are 0 examples of going through a list of DataTables.
List<DataTable> test = new List<DataTable>();
foreach (DataRow dataRow in TEST.LIST)
{
string value = dataRow.Field<string>("Slave_IO_Running"); //Looks for "Slave_IO_Running" status.
if (value == "Yes")
{
results.Add(siteName + ": WORKING"); //adds working to the visual table
}
else
{
results.Add(siteName + ": REPLICATION ERROR"); //adds not working to the result list
}
break;
}

for each datatable you can use DataTable.Rows and for each row you can access the properties as row["columnName"] or traverse each column in the corresponding row
like
foreach(DataTable table in tables)
{
foreach(DataRow row in table.Rows)
{
foreach(DataColumn column in table.Columns)
{
Console.WriteLine(row[column]);
}
}
}

You can try it like this, assuming both tables contain the same columns:
foreach (DataRow dataRow in test.SelectMany(dt => dt.Rows.OfType<DataRow>()))
{
// your code using the rows
}

adding in SortedDictionary

I want to add table name as string and table value as arraylist if table name exist in same key add record as array list ...here showing key already exist . where i can modify :
SortedDictionary<string, ArrayList> DealInfo = new SortedDictionary<string, ArrayList>();
ArrayList Deal = new ArrayList();
string DealName=string.Empty;
foreach (DataTable table in RecentAddedDeal.Tables)
{
foreach (DataRow dr in table.Rows)
{
if (!DealInfo.ContainsKey(Convert.ToString(dr["DealTab"])))
{
DealName = Convert.ToString(dr["DealTab"]);
}
Deal.Add(dr);
DealInfo.Add(DealName, Deal);
}
}

It's hard to tell exactly what you want since your description says you want to use the TableName as the key, but your code is adding a column from the row as a key.
Going with the idea that the TableName should be the key, something like this should work:
var dealInfo = new SortedDictionary<string, List<DataRow>>();
foreach (DataTable table in RecentAddedDeal.Tables)
{
if (!dealInfo.ContainsKey(table.TableName))
{
dealInfo.Add(table.TableName, table.Rows.Cast<DataRow>().ToList());
}
}
Going with the idea that you want to key off a column in each row for the key, you could do something like:
var dealInfo = new SortedDictionary<string, List<DataRow>>();
foreach (DataTable table in RecentAddedDeal.Tables)
{
foreach (DataRow row in table.Rows)
{
var dealName = row["DealTab"].ToString();
if (dealInfo.ContainsKey(dealName))
{
dealInfo[dealName].Add(row);
}
else
{
dealInfo.Add(dealName, new List<DataRow> {row});
}
}
}
To fill a ListView with data from a row for a specific DealName, you can find the dictionary entry for that deal name and access the list of rows this way:
foreach (DataRow row in dealInfo["SomeDealName"])
{
// Here you have access to the rows where row["DealTab"] == "SomeDealName"
// You can fill a list view with some column value from the row like:
listView1.Add(row["SomeColumnName"].ToString());
}

Get value from dataset cell

I am trying to get the value of a specific cell in a dataset. I have a dataset that has at least two tables(could be more). One of the tables has two columns - Name$ and Value$.
I have to search through the dataset by the name column where the name is "FirstName" and save the value corresponding to that specific name.
Here is what I have so far:
string val = null;
foreach (DataTable dt in ds.Tables)
{
foreach (DataRow dr in dt.Rows)
{
foreach (DataColumn dc in dt.Columns)
{
object item = dr[dc];
if (item.ToString().Equals("Name$"))
{
// store the value for that name
}
}
}
}
Any ideas how this could happen, keeping in mind that there could be many tables in the dataset.
EDIT: Here is the full solution:
foreach (DataTable dt in ds.Tables)
{
foreach (DataRow row in dt.Rows)
{
foreach (DataColumn dc in dt.Columns)
{
if (dc.ColumnName.ToString().Equals("Name$"))
{
if (row["Name$"].ToString().Equals("FirstName"))
{
firstName = (string)row[row.Table.Columns["Name$"].Ordinal + 1];
}
if (row["Name$"].ToString().Equals("LastName$"))
{
lastName = (string)row[row.Table.Columns["Name$"].Ordinal + 1];
}
}
}
}
}

Use ColumnName property
string val = null;
foreach (DataTable dt in ds.Tables)
{
foreach (DataRow dr in dt.Rows)
{
foreach (DataColumn dc in dt.Columns)
{
if(dc.ColumnName=="Name")
{
//save
}
}
}
}

foreach (DataRow dr in ds.Tables[0].Rows) //Tables[1]....
{
if(dr["ColumName"].ToString()==....)
// store the value for that name
}
for (int i = 0; i < ds.Tables.Count; i++)
{
foreach (DataRow dr in ds.Tables[i].Rows)
{
//dr....
}
}

C#, Looping through dataset and show each record from a dataset column

In C#, I'm trying to loop through my dataset to show data from each row from a specific column. I want the get each date under the column name "TaskStart" and display it on a report, but its just shows the date from the first row for all rows can anybody help?
foreach (DataTable table in ds.Tables)
{
foreach (DataRow dr in table.Rows)
{
DateTime TaskStart = DateTime.Parse(
ds.Tables[0].Rows[0]["TaskStart"].ToString());
TaskStart.ToString("dd-MMMM-yyyy");
rpt.SetParameterValue("TaskStartDate", TaskStart);
}
}

I believe you intended it more this way:
foreach (DataTable table in ds.Tables)
{
foreach (DataRow dr in table.Rows)
{
DateTime TaskStart = DateTime.Parse(dr["TaskStart"].ToString());
TaskStart.ToString("dd-MMMM-yyyy");
rpt.SetParameterValue("TaskStartDate", TaskStart);
}
}
You always accessed your first row in your dataset.

DateTime TaskStart = DateTime.Parse(dr["TaskStart"].ToString());

foreach (DataRow dr in ds.Tables[0].Rows)
{
//your code here
}

foreach (DataTable table in ds.Tables)
{
foreach (DataRow dr in table.Rows)
{
var ParentId=dr["ParentId"].ToString();
}
}

foreach (DataRow table in ds.Tables[0].Rows)
{
int ForType = Convert.ToInt32(table["Fortype"].ToString());
ds.Tables[0].DefaultView.RowFilter = "ForType ='" + ForType +"'";
rbtnQuestion.DataSource = ds.Tables[0].DefaultView;
rbtnQuestion.DataBind();
}

How to 'foreach' a column in a DataTable using C#?

How do I loop through each column in a datarow using foreach?
DataTable dtTable = new DataTable();
MySQLProcessor.DTTable(mysqlCommand, out dtTable);
foreach (DataRow dtRow in dtTable.Rows)
{
//foreach(DataColumn dc in dtRow)
}

This should work:
DataTable dtTable;
MySQLProcessor.DTTable(mysqlCommand, out dtTable);
// On all tables' rows
foreach (DataRow dtRow in dtTable.Rows)
{
// On all tables' columns
foreach(DataColumn dc in dtTable.Columns)
{
var field1 = dtRow[dc].ToString();
}
}

I believe this is what you want:
DataTable dtTable = new DataTable();
foreach (DataRow dtRow in dtTable.Rows)
{
foreach (DataColumn dc in dtRow.ItemArray)
{
}
}

You can do it like this:
DataTable dt = new DataTable("MyTable");
foreach (DataRow row in dt.Rows)
{
foreach (DataColumn column in dt.Columns)
{
if (row[column] != null) // This will check the null values also (if you want to check).
{
// Do whatever you want.
}
}
}

You can check this out. Use foreach loop over a DataColumn provided with your DataTable.
foreach(DataColumn column in dtTable.Columns)
{
// do here whatever you want to...
}

Something like this:
DataTable dt = new DataTable();
// For each row, print the values of each column.
foreach(DataRow row in dt .Rows)
{
foreach(DataColumn column in dt .Columns)
{
Console.WriteLine(row[column]);
}
}
http://msdn.microsoft.com/en-us/library/system.data.datatable.rows.aspx

In LINQ you could do something like:
foreach (var data in from DataRow row in dataTable.Rows
from DataColumn col in dataTable.Columns
where
row[col] != null
select row[col])
{
// do something with data
}

int countRow = dt.Rows.Count;
int countCol = dt.Columns.Count;
for (int iCol = 0; iCol < countCol; iCol++)
{
DataColumn col = dt.Columns[iCol];
for (int iRow = 0; iRow < countRow; iRow++)
{
object cell = dt.Rows[iRow].ItemArray[iCol];
}
}