i am using a datalist to display videos but i am trying to get it working now with the where clasue ...where the name is equal to wrd.mp4 i am getting the following error,
$exception {"The multi-part identifier \"wrd.mp4\" could not be bound."} System.Exception {System.Data.SqlClient.SqlException}
private void BindGrid()
{
string strConnString = ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ConnectionString;
using (SqlConnection con = new SqlConnection(strConnString))
{
using (SqlCommand cmd = new SqlCommand())
{
cmd.CommandText = "select Id, Name from tblFiles where Name=wrd.mp4";
cmd.Connection = con;
con.Open();
DataList1.DataSource = cmd.ExecuteReader();
DataList1.DataBind();
con.Close();
}
}
}
}
You need to use quotes:
cmd.CommandText = "select Id, Name from tblFiles where Name='wrd.mp4'";
Related
I was trying to connectMs_sql database in asp.net but server error of network path not found... it is not able to establish connection to sql server...comes while in gridview it is taking it as sqldatasource perfectly
This for customized class to call the ADO.Net. Please use this and let me know if you have any doubts.
public class DbConnectionHelper {
public DataSet DBConnection(string TableName, SqlParameter[] p, string Query, CommandType cmdText) {
string connString = # "your connection string here";
//Object Declaration
DataSet ds = new DataSet();
SqlConnection con = new SqlConnection();
SqlCommand cmd = new SqlCommand();
SqlDataAdapter sda = new SqlDataAdapter();
try {
//Get Connection string and Make Connection
con.ConnectionString = connString; //Get the Connection String
if (con.State == ConnectionState.Closed) {
con.Open(); //Connection Open
}
if (cmdText == CommandType.StoredProcedure) //Type : Stored Procedure
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = Query;
if (p.Length > 0) // If Any parameter is there means, we need to add.
{
for (int i = 0; i < p.Length; i++) {
cmd.Parameters.Add(p[i]);
}
}
}
if (cmdText == CommandType.Text) // Type : Text
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = Query;
}
if (cmdText == CommandType.TableDirect) //Type: Table Direct
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = Query;
}
cmd.Connection = con; //Get Connection in Command
sda.SelectCommand = cmd; // Select Command From Command to SqlDataAdaptor
sda.Fill(ds, TableName); // Execute Query and Get Result into DataSet
con.Close(); //Connection Close
} catch (Exception ex) {
throw ex; //Here you need to handle Exception
}
return ds;
}
}
I am trying to get details of an account in a row using the Username instead of id. I have limited knowledge on this matter so im only stuck with the code that i learned in class.
I have tried changing variables, but probably wont help and the code i have provided below, would not retrieve any data from the database...
(Username are retrieved from previous page and yes it did show up in this page)
This is the code used on previous page: (code is placed on a button)
string username = Session["Username"].ToString();
Response.Redirect("EditAccountDetail.aspx?Username="+ username);
private DataTable GetData()
{
string constr = ConfigurationManager.ConnectionStrings["myDbConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("SELECT * FROM Guest"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
return dt;
}
}
}
}
}
This is the code im working on right now:
String Uname = Request.QueryString["Username"];
string constr = ConfigurationManager.ConnectionStrings["MyDbConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("SELECT * FROM Guest WHERE Username='" + Uname+"'"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
foreach (DataRow row in dt.Rows)
{
string id = row["Id"].ToString();
string Full_name = row["Full_name"].ToString();
string Username = row["Username"].ToString();
string Password = row["Password"].ToString();
string Email = row["Email"].ToString();
string DOB = row["DOB"].ToString();
string Gender = row["Gender"].ToString();
this.HiddenField1.Value = id;
this.TextBox_Name.Text = Full_name;
this.TextBox_Username.Text = Username;
this.TextBox_Password.Text = Password;
this.TextBox_Email.Text = Email;
this.TextBox_DOB.Text = DOB;
this.RadioButtonList_Gender.Text = Gender;
}
}
}
}
}
This is the code in the button:
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["myDbConnectionString"].ConnectionString);
try
{
string query = "UPDATE Guest SET Full_name=#Full_name, Username=#Username, Password=#Password, Email=#Email, DOB=#DOB, Gender=#Gender WHERE Id=#id";
SqlCommand cmd = new SqlCommand(query, con);
cmd.Parameters.AddWithValue("#id", HiddenField1.Value);
cmd.Parameters.AddWithValue("#Full_name", TextBox_Name.Text);
cmd.Parameters.AddWithValue("#Username", TextBox_Username.Text);
cmd.Parameters.AddWithValue("#Password", TextBox_Password.Text);
cmd.Parameters.AddWithValue("#Email", TextBox_Email.Text);
cmd.Parameters.AddWithValue("#DOB", TextBox_DOB.Text);
cmd.Parameters.AddWithValue("#Gender", RadioButtonList_Gender.Text);
con.Open();
cmd.ExecuteNonQuery();
Response.Redirect("GuestMenu.aspx");
con.Close();
}
catch (Exception ex)
{
Response.Write("Error: " + ex.ToString());
}
If you are redirecting to the "GuestMenu" page, then you have to add username in the query string so that you can retrieve this on the page.
Response.Redirect("GuestMenu.aspx?Username="+TextBox_Username.Text);
By seeing your current code, you should be getting some error. Please post the error details if any.
You can try changing the query as below and check for database result
new SqlCommand("SELECT * FROM Guest WHERE Username='" + Uname + "'")
hello i have created the code for extracting age from table test
but instead of returning the age it is returning me the following statement
System.Data.SqlClient.SqlDataReader
here is the code
[WebMethod]
public string Getcustomername(string name)
{
SqlConnection con = new SqlConnection("Data Source=GURJOT;Initial Catalog=TEST;Integrated Security=True");
SqlCommand com = new SqlCommand();
com.Connection = con;
con.Open();
com.CommandText = "SELECT * from test WHERE Name='" + name + "'";
SqlDataReader dt = com.ExecuteReader();
dt.Read();
con.Close();
dt.Close();
return dt.ToString();
any help would be appreciated
Thanks
Instead of returning dt.ToString() you should return the value of a field:
public string GetCustomerAge(string name)
{
using (SqlConnection con = new SqlConnection("Data Source=GURJOT;Initial Catalog=TEST;Integrated Security=True"))
{
using(SqlCommand com = new SqlCommand())
{
com.Connection = con;
con.Open();
com.CommandText = "SELECT age from test WHERE Name='" + name + "'";
using (SqlDataReader dt = com.ExecuteReader())
{
if (dt.Read())
{
return System.Convert.ToString(dt.GetValue(0));
}
}
}
return "";
}
And please, use parameterized queries - http://en.wikipedia.org/wiki/SQL_injection .
This is my code in class file:
public class terminarzLiga
{
public static List<terminarz> wyswietlTerminarz(string liga)
{
List<terminarz> wyswietlTerminarz = new List<terminarz>();
string CS = ConfigurationManager.ConnectionStrings["ligiConnection"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
SqlCommand com = new SqlCommand("Select * from TerminarzLaLiga", con);
con.Open();
SqlDataReader rdr = com.ExecuteReader();
while (rdr.Read())
[.... rest of code .....]
My intention is use variable in Sql Command query, like this:
Code behind:
private void ZaladujGridView()
{
GridView2.DataSource = EuroPilka.terminarzLiga.wyswietlTerminarz("TerminarzLaLiga");
GridView2.DataBind();
}
Class file code:
public class terminarzLiga
{
public static List<terminarz> wyswietlTerminarz(string liga)
{
List<terminarz> wyswietlTerminarz = new List<terminarz>();
string CS = ConfigurationManager.ConnectionStrings["ligiConnection"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
SqlCommand com = new SqlCommand("Select * from '" + liga +"'", con);
con.Open();
SqlDataReader rdr = com.ExecuteReader();
while (rdr.Read())
[.... rest of code .....]
but i'am receiving error while reader is executing
SqlDataReader rdr = com.ExecuteReader();
Many thanks for any advise !
I am using this code to search for selected items inside a checkbox list and it doesn't work.
protected void btnSearchCode_Click(object sender, ImageClickEventArgs e)
{
string selectedValues = string.Empty;
foreach (ListItem item in cblCode.Items)
{
if (item.Selected)
selectedValues += item.Value + ",";
}
if (selectedValues != string.Empty)
selectedValues = selectedValues.Remove(selectedValues.Length - 1);
cblCode.DataSource = DataReport.SearchCode(selectedValues);
cblCode.DataBind();
}
public static DataTable SearchCode(string selectedValues)
{
string strcon = ConfigurationManager.ConnectionStrings["LocalDB"].ConnectionString;
DataTable datatable = new DataTable();
using (SqlConnection conn = new SqlConnection(strcon))
{
conn.Open();
SqlCommand command = new SqlCommand();
string strQuery = "Select Group, Name from Details where Code in (" + selectedValues + ")", conn;
command.Connection = conn;
SqlDataAdapter dataadapter = new SqlDataAdapter();
dataadapter.SelectCommand = command;
DataSet ds = new DataSet();
dataadapter.Fill(datatable);
}
return datatable;
}
Really appreciate any help on this.
You have not used strQuery at all.
Try this :
public static DataTable SearchCode(string selectedValues)
{
string strcon = ConfigurationManager.ConnectionStrings["LocalDB"].ConnectionString;
DataTable datatable = new DataTable();
using (SqlConnection conn = new SqlConnection(strcon))
{
conn.Open();
string strQuery = "Select Group, Name from Details where Code in (" + selectedValues + ")";
SqlCommand command = new SqlCommand(strQuery, conn);
SqlDataAdapter dataadapter = new SqlDataAdapter();
dataadapter.SelectCommand = command;
DataSet ds = new DataSet();
dataadapter.Fill(datatable);
}
return datatable;
}
You create the query string but you never assign it to the command variable. Therefore, when you assign it to selectCommand, there isn't anything to query from DB. You want to add this line of code to assign the query string to variable:
command = new SqlCommand(strQuery,conn);
Always Use SqlParamerter while passing parameters to the database
i think You are missing single inverted comma because Your SeletedValues is string
string strQuery = "Select Group, Name from Details
where Code in ('" + selectedValues + "')", conn;