如何在C＃中将DataTable单元格值转换为对象数组

Question

Here is my code,

object[] objrow = new object[]{"Test","test1","test2","test3","test4"};

object[] objrow1 = new object[]{"Test","test1","test2","test3","test4"};

 DataTable dtentercodemfm = new DataTable();
 dtentercodemfm.Columns.Add("objrow");
 dtentercodemfm.Columns.Add("objrow1");
 dtentercodemfm.Rows.Add(objrow, objrow1);

While Getting this Data,

object[] objrow = (object[])dtentercodemfm.Rows[0][0];
object[] objrow1 = (object[])dtentercodemfm.Rows[0][1];

Gives me error

Unable to cast object of type 'System.String' to type 'System.Object[]'.

How to Solve.

Answer 1

你可以试试

object[] objrow = (object[]) Convert.ToString(dtentercodemfm.Rows[0][0]).Split(',') ;

Answer 2

This would work (Tried and tested).

While creating columns do this

dtentercodemfm.Columns.Add("objrow", typeof (object[]));
dtentercodemfm.Columns.Add("objrow1", typeof (object[]));

Why this works

Because when you do not provide type while creating column, default type is taken which is String. So data was storing in DB as string which was "System.Object".

Answer 3

Shouldn't you need to write your question like this

    dtentercodemfm.Columns.Add("objrow");

    dtentercodemfm.Rows.Add(objrow);
    dtentercodemfm.Rows.Add(objrow1);

    dtentercodemfm.AcceptChanges();

Add 2 rows and 1 columns, You're doing reverse, adding 1 column, and adding 2 rows