how to retrieve multiple data from database using SqlDataReader? - asp.net

Question

i have database table in which i have two columns name picid and pic1..in my pic1 column i have three data..now while wanting to retrive the data using sqldatareader i am getting the top of the column data..how to get the all data of that column and use it for the further purpose..
my code
protected void Page_Load(object sender, EventArgs e)
{
string con = " ";
con = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
SqlConnection objsqlconn = new SqlConnection(con);
objsqlconn.Open();
SqlCommand cmd = new SqlCommand("SELECT * From pictable", objsqlconn);
SqlDataReader grpIDreader = cmd.ExecuteReader();
grpIDreader.Read();
string path = grpIDreader["pic1"].ToString();
//slide.Attributes["style"] = String.Format("background-image:url('{0}')", path);
image1.Attributes["src"] = String.Format("{0}", path);
image2.Attributes["src"] = String.Format("{1}", path);
image3.Attributes["src"] = String.Format("{2}", path);
}
i want to just get the path which are saved in the pic1 column of the database..
i am getting this error " System.FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list."
i have tried like that also and getting same error
protected void Page_Load(object sender, EventArgs e)
{
string con = " ";
con = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
SqlConnection objsqlconn = new SqlConnection(con);
objsqlconn.Open();
SqlCommand cmd = new SqlCommand("SELECT * From pictable", objsqlconn);
SqlDataReader grpIDreader = cmd.ExecuteReader();
string[] path={"","",""};
int i = 0;
while(grpIDreader.Read())
{
path[i++] = grpIDreader["pic1"].ToString();
}
//slide.Attributes["style"] = String.Format("background-image:url('{0}')", path);
image1.Attributes["src"] = String.Format("{0}", path[0]);
image2.Attributes["src"] = String.Format("{1}", path[1]);
image3.Attributes["src"] = String.Format("{2}", path[2]);
}

Answer 1

You are getting a string formatting error, not a database error:
image1.Attributes["src"] = String.Format("{0}", path); //This works, as 0 indicates the first argument you are passing in
image2.Attributes["src"] = String.Format("{1}", path); //This won't work, as you are asking for the second argument, which doesn't exist

Answer 2

Use the following to get each row
using (SqlDataReader grpIDreader = cmd.ExecuteReader())
{
while (grpIDreader.Read()) //.Read() advances to the next row and returns false if there are no more
{
string path = grpIDreader["pic1"].ToString();
//other stuff here
}
}
also
instead of this
image1.Attributes["src"] = String.Format("{0}", path[0]);
do this
image1.Attributes["src"] = path[0];