将datarow数组转换为datatable的简单方法

Question

我想将DataRow数组转换为DataTable...最简单的方法是什么？

Answer 1

对于.Net Framework 3.5+

DataTable dt = new DataTable();
DataRow[] dr = dt.Select("Your string");
DataTable dt1 = dr.CopyToDataTable();

但是如果数组中没有行,则可能导致错误,例如source不包含DataRows.因此,如果您决定使用此方法CopyToDataTable(),则应检查数组以确定它是否具有数据行.

if (dr.Length > 0)
    DataTable dt1 = dr.CopyToDataTable();

MSDN上提供的参考: DataTableExtensions.CopyToDataTable方法(IEnumerable)

Answer 2

为什么不通过你的DataRow数组进行迭代,并添加(使用DataRow.ImportRow,如果必要的话,得到的DataRow的副本),是这样的:

foreach (DataRow row in rowArray) {
   dataTable.ImportRow(row);
}

确保您的dataTable与DataRow阵列中的DataRows具有相同的架构.

Answer 3

DataTable dt = new DataTable(); 

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

dt.Rows.Add(dr);

Answer 4

另一种方法是使用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");

Answer 5

简单的方法是:

// 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());

Answer 6

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

Answer 7

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

Answer 8

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