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system.argumentexception column does not belong to table

I have a Defined Dataset with table Customer in it. I'm trying to add a row to this Dataset but I'm getting an error below is my code
DataSet ds = new DataSet1();
DataTable dt = new DataTable("Customer");
using (StreamReader reader = new StreamReader(fileStream))
{
while(reader.Peek() >= 0)
{
string row = reader.ReadLine();
string[] content = row.Split('|');
DataRow dr = dt.NewRow();
dr["mother_name"] = content[0]; // I'm getting an error here.
dr["beneficial_name"] = content[1];
dr["industry_code"] = content[2];
dt.Rows.Add(dr);
}
}
filestream.Close();
ds.Tables.Add(dt);
cryRpt.SetDataSource(ds);
So I'm getting an exception error in line dr["emp_lastname"] = content[0]; the key exist in the table in my dataset. So I assumed that when I do dt.NewRow() it will create an instance of my dataset table row. How do I solve this? I just want to populate a row in my DataSet Table. Below is the screenshot of my Dataset

You have a Dataset instance in ds and a DataTable instance in dt. That DataTable instance is not linked to your Dataset in anyway. The Datatable has therefore no columns.
Do a dt=ds.Tables["Customer"]; instead to get an instance of the Datatable that conforms to the schema in your typed dataset.

c# split one datatable to several into dataset

I have correct source DataTable "sourceDataTable" and I call method to split it into several and store the result into DataSet "ds":
DataSet ds = MyClass.SplitDataTables(sourceDataTable);
Here is the method MyClass.SplitDataTables():
public static DataSet SplitDataTables(DataTable sourceDataTable)
{
using (DataSet dsOut = new DataSet())
{
DataTable dt1 = new DataTable;
DataTable dt2 = new DataTable;
DataTable dt3 = new DataTable;
dt1 = sourceDataTable.Clone();
dt2 = sourceDataTable.Clone();
dt3 = sourceDataTable.Clone();
foreach (DataRow row in sourceDataTable.Rows)
{
//column is for example "City" and some row has "Boston" in it, so I put this row into dt1
if (row["ColumnName"].ToString() == "something")
{
dt1.ImportRow(row);
}
else if (...)
{ } //for other DataTables dt2, dt3, etc...
else .......... ;
}
//here I put resulting DataTables into one DataSet which is returned
string[] cols= { "dt1", "dt2", "dt3" };
foreach (string col in cols)
{
dsOut.Tables.Add(col);
}
return dsOut;
}
}
So with this returned DataSet I display new Windows each with one DataTable
foreach (DataTable dtt in ds.Tables)
{
string msg = dtt.TableName;
Window2 win2 = new Window2(dtt, msg);
win2.Show();
}
All I get shown is Windows with placeholder for "empty DataGrid"
Windows code is correct, as it works whith "unsplit DataTable".
I assume code in splitting DataTables is all wrong as it does not output DataSet with filled DataTables. I will greatly appreciate any help on this issue. Thank you!

You don't need a for loop here
Replace below code
string[] cols= { "dt1", "dt2", "dt3" };
foreach (string col in cols)
{
dsOut.Tables.Add(col);
}
With this
dsOut.Tables.Add(dt1);
dsOut.Tables.Add(dt2);
dsOut.Tables.Add(dt3);

Thanks to #Krishna I got this solved. So if you ever encounter similar problem here are 2 things to note:
string[] cols = { "dt1", "dt2", "dt3", ... };
foreach (string col in cols)
{
dsOut.Tables.Add(col);
}
This cycle does not have access to objects of DataTables with same name and writes only empty DataTables into DataSet collection (regardless of same name!).
If you create new DataTable and you will be making it a clone of another DataTable, dont bother yet with setting its name.
DataTable dt1 = new DataTable();
Make new DataTable of same format as source DataTable:
dt1 = sourceDataTable.Clone();
dt2 = sourceDataTable.Clone();
//etc...
Now you have to set unique DataTable names to each DataTable cloned from source DataTable:
dt1.TableName = "Name1";
dt2.TableName = "Name2";
//and so on
Now all works as intended.

How do I store multiple results from a stored procedure into a dataset?

How do I combine to result sets from a StoredProcedure into one dataset in ASP.NET?
Below is my code in asp.net
SqlDataAdapter adap = new System.Data.SqlClient.SqlDataAdapter("sp_Home_MainBanner_TopStory",con);
adap.SelectCommand.CommandType = CommandType.StoredProcedure;
adap.SelectCommand.Parameters.AddWithValue("#rows", 9);
DataSet DS = new DataSet();
adap.Fill(DS, "Table1");
adap.Fill(DS, "Table2");
GridView1.DataSource = DS.Tables["Table2"];
GridView1.DataBind();
Even if there were two adapters, how could I combine the results into one dataset?

In MS SQL we create a procedure like:
[ create proc procedureName
as
begin
select * from student
select * from test
select * from admin
select * from result
end
]
In C#, we write following code to retrieve these values in a DataSet
{
SqlConnection sqlConn = new SqlConnection("data source=(local);initial catalog=bj001;user id=SA;password=bj");
SqlCommand sqlCmd = new SqlCommand("procedureName", sqlConn);
sqlCmd.CommandType = CommandType.StoredProcedure;
sqlConn.Open();
SqlDataAdapter sda = new SqlDataAdapter(sqlCmd);
DataSet ds = new DataSet();
sda.Fill(ds);
sqlconn.Close();
// Retrieving total stored tables from a common DataSet.
DataTable dt1 = ds.Tables[0];
DataTable dt2 = ds.Tables[1];
DataTable dt3 = ds.Tables[2];
DataTable dt4 = ds.Tables[3];
// To display all rows of a table, we use foreach loop for each DataTable.
foreach (DataRow dr in dt1.Rows)
{
Console.WriteLine("Student Name: "+dr[sName]);
}
}

A DataSet contains Tables. For your above example, if you had two SqlDataAdapters, each calling a stored procedure and stored them like you did above.
adapter1.Fill(DS, "Table1");
adapter2.Fill(DS, "Table2");
This will take the table results from your first query and store it in the DataSet DS as Table1. It will then store another Table (Table2) in the same DataSet. To access these tables you use the following code:
DS.Tables["Table1"] //Or Table2, or whatever you name it during your Fill.
You already have the right process, you just need to look up how a DataSet works and decide how you want to call your information.
IF you want to combine your results into one DataTable however, you will need to iterate through the tables and combine information.
ex:
DataTable combinedTable = new DataTable();
//Create columns
foreach (DataRow row in DS.Tables["Table1"].Rows)
{
//Create rows? Copy information over? Whatever you want to do.
}

try using this:
adapter1.Fill(DS, "Table1, Table2");
this works here so...

Run time error 'Cannot find column 0'

Run time error Cannot find column 0. below is my code
string connectiostring = (string)ConfigurationSettings.AppSettings["NorthwindConnectionString"];
SqlConnection conn = new SqlConnection(connectiostring);
SqlCommand cmd = new SqlCommand("select * from Employees", conn);
conn.Open();
SqlDataAdapter adapter = new SqlDataAdapter(cmd);
DataSet data = new DataSet();
adapter.Fill(data,"Employees");
data.Tables["Employees"].Columns.Add("Testcolumn");
DataTable t1 = new DataTable("Employees");
DataRow newrow = t1.NewRow();
newrow[0] = "10";\\this the line i am getting error
newrow[1] = "Pradeep";
newrow[2] = "Kumar";
data.Tables["Employees"].Rows.Add(newrow);
GridView2.DataSource = data;
GridView2.DataBind();
Please help me
Thanks,

You haven't added the columns to the DataTable.
t1.Columns.Add(new DataColumn
{
DataType = string,
ColumnName = "First Name"
});
repeat this for each column supplying the correct type for each.

Create a function that adds columns before trying to add rows.. Call the method at InitializeComponents..
ex.
private void InitTbl(DataTable myTbl)
{
myTbl.Columns.Add(new DataColumn("id"));
myTbl.Columns.Add(new DataColumn("fname"));
myTbl.Columns.Add(new DataColumn("lname"));
}

You need to add some columns to the table first:
DataTable t1 = new DataTable("Employees");
t1.Columns.Add("column1", typeof(string));
t1.Columns.Add("column2", typeof(string));
t1.Columns.Add("column3", typeof(string));
DataRow newrow = t1.NewRow();
...

I think maybe this is actually your problem.
DataTable t1 = new DataTable("Employees")
This creates a brand new table object that is not part of your dataset.
So you should be replace it with this
DataTable t1 = data.Tables["Employees"]
Which gets the table from the dataset and points the t1 variable at that table.

Simple way to convert datarow array to datatable

I want to convert a DataRow array into DataTable ... What is the simplest way to do this?

For .Net Framework 3.5+
DataTable dt = new DataTable();
DataRow[] dr = dt.Select("Your string");
DataTable dt1 = dr.CopyToDataTable();
But if there is no rows in the array, it can cause the errors such as The source contains no DataRows. Therefore, if you decide to use this method CopyToDataTable(), you should check the array to know it has datarows or not.
if (dr.Length > 0)
DataTable dt1 = dr.CopyToDataTable();
Reference available at MSDN:
DataTableExtensions.CopyToDataTable Method (IEnumerable)

Why not iterate through your DataRow array and add (using DataRow.ImportRow, if necessary, to get a copy of the DataRow), something like:
foreach (DataRow row in rowArray) {
dataTable.ImportRow(row);
}
Make sure your dataTable has the same schema as the DataRows in your DataRow array.

DataTable dt = new DataTable();
DataRow[] dr = (DataTable)dsData.Tables[0].Select("Some Criteria");
dt.Rows.Add(dr);

Another way is to use a DataView
// Create a DataTable
DataTable table = new DataTable()
...
// Filter and Sort expressions
string expression = "[Birth Year] >= 1983";
string sortOrder = "[Birth Year] ASC";
// Create a DataView using the table as its source and the filter and sort expressions
DataView dv = new DataView(table, expression, sortOrder, DataViewRowState.CurrentRows);
// Convert the DataView to a DataTable
DataTable new_table = dv.ToTable("NewTableName");

Simple way is:
// dtData is DataTable that contain data
DataTable dt = dtData.Select("Condition=1").CopyToDataTable();
// or existing typed DataTable dt
dt.Merge(dtData.Select("Condition=1").CopyToDataTable());

DataTable Assetdaterow =
(
from s in dtResourceTable.AsEnumerable()
where s.Field<DateTime>("Date") == Convert.ToDateTime(AssetDate)
select s
).CopyToDataTable();

DataTable dt = myDataRowCollection.CopyToDataTable<DataRow>();

DataTable dt = new DataTable();
foreach (DataRow dr in drResults)
{
dt.ImportRow(dr);
}

.Net 3.5+ added DataTableExtensions, use DataTableExtensions.CopyToDataTable Method
For datarow array just use .CopyToDataTable() and it will return datatable.
For single datarow use
new DataRow[] { myDataRow }.CopyToDataTable()

You could use System.Linq like this:
if (dataRows != null && dataRows.Length > 0)
{
dataTable = dataRows.AsEnumerable().CopyToDataTable();
}

Here is the solution. It should work fine.
DataTable dt = new DataTable();
dt = dsData.Tables[0].Clone();
DataRows[] drResults = dsData.Tables[0].Select("ColName = 'criteria');
foreach(DataRow dr in drResults)
{
object[] row = dr.ItemArray;
dt.Rows.Add(row);
}

Incase anyone needs it in VB.NET:
Dim dataRow as DataRow
Dim yourNewDataTable as new datatable
For Each dataRow In yourArray
yourNewDataTable.ImportRow(dataRow)
Next

You need to clone the structure of Data table first then import rows using for loop
DataTable dataTable =dtExisting.Clone();
foreach (DataRow row in rowArray) {
dataTable.ImportRow(row);
}

DataTable dataTable = new DataTable();
dataTable = OldDataTable.Tables[0].Clone();
foreach(DataRow dr in RowData.Tables[0].Rows)
{
DataRow AddNewRow = dataTable.AddNewRow();
AddNewRow.ItemArray = dr.ItemArray;
dataTable.Rows.Add(AddNewRow);
}