Windows Application c#

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SQL-Server-2005

Hi ,

Lately i was trying to develop a windows application with c# n sql 2005. i got stucked at a point where i can insert data into the sql db but when i close n open my application, the data is gone. i'll explain briefly,
i've created the sql database(i.e, SKTDB.mdf) and table using server explorer in visual studio 08. my connection string is like ,

C#

sDBPath = Application.StartupPath + "\\DB\\SKTDB.mdf";
 if (System.IO.File.Exists(sDBPath))
 {
   connStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename='" + sDBPath + "';User ID=sa;Password=1234";
 }

I have a registration form in my app. when i fill the form and submit , the data is inserted into the table in SKTDB.mdf. but when i restarts my application , the table is empty. I cant figure out the reason. if u guys can , pls let me know..

Posted 15-Feb-12 23:09pm

arun.emm

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Comments

thatraja 16-Feb-12 5:48am

Show the code(Data insert/update)

arun.emm 16-Feb-12 7:49am

Here's my coding..

SqlTransaction OraTrans = null;
string sNoOfRecAff = null;
string sDBPath = Application.StartupPath + "\\DB\\SKTDB.mdf";
if (System.IO.File.Exists(sDBPath))
{
strConnString = "Data Source=.\\SQLEXPRESS;AttachDbFilename='" + sDBPath + "';User ID=sa;Password=1234";
}
string strSQL = "INSERT INTO EmpDetails(StaffCode, FirstName, LastName, Gender, DOB, Age, Father_Hus_Name, Address, Mobileno, Experience, prevCompAdd, DOJ, Designation, BasicSalary) VALUES(" + txt_code.Text + ",'" + txt_fname.Text + "','" + txt_lname.Text + "','" + g + "','" + dob + "','" + txt_age.Text + "','" + txt_father.Text + "','" + txt_addr.Text + "','" + txt_mobile.Text + "','" + cb_exp.SelectedItem.ToString() + "','" + txt_previousco.Text + "','" + doj + "','" + txt_desig.Text + "','" + txt_basic.Text + "')";
try
{
myConn = new SqlConnection(strConnString);
myConn.Open();
OraTrans = myConn.BeginTransaction();
//myCmd.Transaction = OraTrans;
myCmd = new SqlCommand(strSQL, myConn, OraTrans);
sNoOfRecAff = myCmd.ExecuteNonQuery().ToString();
OraTrans.Commit();
OraTrans.Dispose();
return sNoOfRecAff;
}

catch (Exception ex)
{
OraTrans.Rollback();
return ex.Message;
}

finally
{
myConn.Close();
myCmd.Dispose();
myConn.Dispose();
}

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RDBurmon · Answer 1 · 2012-02-15T23:41:00

Solution 1

Hi Arun ,

This is not a process of database programming with C#.
I will explain you briefly

Suppose you have below information to be save in database.
1) Full Name of user
2) Mobile number of user
3) Location of user

Then Create this table into sql server

SQL

Create table registration
(
 regid uniqueidentifier, fullname nvarchar(255),Mobile nvarchar(50),Location nvarchar(50)
)

then create this procedure

SQL

CREATE PROCEDURE Saveregistration 
(
 @Full NVARCHAR(50),
 @Mobile NVARCHAR(50),
 @Location NVARCHAR(50)
)
AS
BEGIN
  INSERT INTO registration
  select newid(), @Full,@Mobile,@Location
END

then use below code to call this procedure

C#

 SqlConnection con ;
 con=new SqlConnection("Data Source=;initial catalog=Northwind;User Id=;Password= '");
con.open();

SqlCommand command = new SqlCommand("Saveregistration ",con);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add(new SqlParameter("@Full",SqlDbType.NVARCHAR,50,txtfullname.text));
command.Parameters.Add(new SqlParameter("@Mobile ",SqlDbType.NVARCHAR,50,txtMobile.txt));
command.Parameters.Add(new SqlParameter("@Location ",SqlDbType.NVARCHAR,50,txtLocation.txt));

  int i=command.ExecuteNonQuery();

Hope this helps if yes then accept and vote the answer otherwise revert back with your queries
--Rahul D.

Posted 15-Feb-12 23:41pm

RDBurmon

Comments

arun.emm 16-Feb-12 7:29am

Hi Rahul ,
Thanks for your reply.. But i dont want to create database and tables in sql management studio. I want to create database within the application folder using server explorer of vs 2008. And i've created it already but got a problem which i have stated above.

RDBurmon 16-Feb-12 7:31am

I suggest you instead of this
SqlConnection con ;
con=new SqlConnection("Data Source=;initial catalog=Northwind;User Id=;Password= '");
con.open();

sDBPath = Application.StartupPath + "\\DB\\SKTDB.mdf";
if (System.IO.File.Exists(sDBPath))
{
connStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename='" + sDBPath + "';User ID=sa;Password=1234";
}

Which is perfectly fine
Hope this helps if yes then accept and vote the answer otherwise revert back with your queries
--Rahul D.

in my example
use your way of connection string

arun.emm 16-Feb-12 7:54am

Here's my coding..
SqlTransaction OraTrans = null;
string sNoOfRecAff = null;
string sDBPath = Application.StartupPath + "\\DB\\SKTDB.mdf";
if (System.IO.File.Exists(sDBPath))
{
strConnString = "Data Source=.\\SQLEXPRESS;AttachDbFilename='" + sDBPath + "';User ID=sa;Password=1234";
}
string strSQL = "INSERT INTO EmpDetails(StaffCode, FirstName, LastName, Gender, DOB, Age, Father_Hus_Name, Address, Mobileno, Experience, prevCompAdd, DOJ, Designation, BasicSalary) VALUES(" + txt_code.Text + ",'" + txt_fname.Text + "','" + txt_lname.Text + "','" + g + "','" + dob + "','" + txt_age.Text + "','" + txt_father.Text + "','" + txt_addr.Text + "','" + txt_mobile.Text + "','" + cb_exp.SelectedItem.ToString() + "','" + txt_previousco.Text + "','" + doj + "','" + txt_desig.Text + "','" + txt_basic.Text + "')";

try
{
myConn = new SqlConnection(strConnString); myConn.Open(); OraTrans = myConn.BeginTransaction();
//myCmd.Transaction = OraTrans;
myCmd = new SqlCommand(strSQL, myConn, OraTrans);
sNoOfRecAff = myCmd.ExecuteNonQuery().ToString();
OraTrans.Commit();
OraTrans.Dispose();
return sNoOfRecAff;
}
catch (Exception ex)
{
OraTrans.Rollback();
return ex.Message;
}
finally
{
myConn.Close();
myCmd.Dispose();
myConn.Dispose();
}

is this a right way to do it?..

RDBurmon 16-Feb-12 8:05am

Try this as well

myConn.Commit();