Exporting all table in SQL Server to .text using C# - sql-server

Question

I have an application that trying to extract all data in different table with 1 Database. First, I stored all the query in a .txt file to retrieve the table name and stored it in List.
[Here's my .txt file]
string script = File.ReadAllText(#"D:\Schooldb\School.txt");
List<string> strings = new List<string>();
strings.Add(script);
using (SqlConnection connection = new SqlConnection(constring))
{
foreach (string x in strings)
{
using (SqlCommand cmd = new SqlCommand(x, connection))
{
using (SqlDataAdapter adapter = new SqlDataAdapter())
{
cmd.Connection = connection;
adapter.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
adapter.Fill(dt);
string txt = string.Empty;
foreach (DataColumn column in dt.Columns)
{
//Add the Header row for Text file.
txt += column.ColumnName + "\t\t";
}
//Add new line after Column Name.
txt += "\r\n";
foreach (DataRow row in dt.Rows)
{
foreach (DataColumn column in dt.Columns)
{
//Add the Data rows.
txt += row[column.ColumnName].ToString() + "***";
}
//Add new line.
txt += "\r\n";
}
int y = 0;
StreamWriter file = new StreamWriter($#"D:\SchoolOutput\{x}_{DateTime.Now.ToString("yyyyMMdd")}.txt");
file.WriteLine(txt.ToString());
file.Close();
y++;
}
}
}
}
Expected:
teachers_datetoday
students_datetoday
subjects_datetoday
But reality my output is just
datetoday txt
Can someone tell me, where part did I go wrong?
Thanks in advance!

Answer 1

There are other approaches for extracting data directly using SSMS.
In this case, your code reads the entire text as a single string, and the for loop runs only once.
Instead of reading the entire file as a string, you can have each line as one command and read the commands like the following.
foreach (string line in System.IO.File.ReadLines(#"D:\Schooldb\School.txt"))
{
//Each line contains one command
//Write your logic here
}