将数据行数组转换为数据表的简单方法

DataTable dt = new DataTable();


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


dt.Rows.Add(dr);

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.

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)

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);
}

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");

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

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

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());

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

.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();
}

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);
}

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

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);
}