I have created a multi-dimensional array:
string[,] array_questions = new string[dt.Rows.Count, dt.Columns.Count];
for (i = 0; i < dt.Rows.Count; i++)
{
for (j = 0; j < dt.Columns.Count; j++)
{
array_questions[i, j] = dt.Rows[i][j].ToString();
}
}
foreach (string number in array_questions)
{
Response.Write(number + "\n");
}
But it displays the entire array in one single lengthy row. How can I display it row-wise in the aspx page?
Your problem is that foreach loop for rectangle two dimensional array will return all elements from that array one at a time. You need to use indexes to access rows and columns of a two-dimensional array.
Go through each row and display each element. Then add paragraph (new line) after each row.
Example is given below:
for (int row = 0; row < array_questions.GetLength(0); row++)
{
for (int column = 0; column < array_questions.GetLength(1); column++)
{
//writing data, you probably want to add comma after it
Response.Write(array_questions[row,column]);
}
//adding new line, so that next loop will start from new line
Response.Write(Environment.NewLine);
}
for array of 5 rows and 10 columns of default int values, I've received next table
0000000000
0000000000
0000000000
0000000000
0000000000
If you had correctly populated array_questions before, you should receive table-view data on page, resulted in Response.Write calls.
A much cleaner solution would be to reuse dt (I assume it's a DataTable) Rows property, which is IEnumerable<DataRowCollection>. Next code achieves similar behavior, but in much cleaner fashion, and you don't need another array.
foreach (var row in dt.Rows)
{
Response.Write(string.Join(", ", row) + Environment.NewLine);
}
will print data in next table-like fashion:
0, 0, 0, 0, 0, 0, 0, 0, 0, 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0
string.Join would work perfectly on a jagged array, but in case of rectangle array, there is no build-in mechanism to retrieve separate rows and lines. ArraySergment works on one-dimensional array (or jagged arrays, which is basically a one-dimensional array of one-dimensional arrays).
for (int r = 0; r < dt.Rows.Count; r++)
{
for (int c = 0; c < dt.Columns.Count; c++)
{
Response.Write(String.Join(", ", dt.Rows[r][c].ToString()));
}
Response.Write("<br />");
}
array_questions formatted in table, not the count of each dimension.what You think about this way?
for (int r = 0; r < table.GetLength(0); r++)
{
for (int k = 0; k < table.GetLength(0); k++)
{
Console.Write((table[r, k] + " " ));
}
Console.Write(Environment.NewLine + Environment.NewLine);
}
Console.ReadLine();
