connection property has not been initialised

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i have doing add/edit/delete with girdview controls........
my edit control coding is looko like....

C#

protected void EditCustomer(object sender, GridViewEditEventArgs e)
{
    GridView1.EditIndex = e.NewEditIndex;
    fillgrid();
}

protected void CancelEdit(object sender, GridViewCancelEditEventArgs e)
{
    GridView1.EditIndex = -1;
    fillgrid();
}

protected void UpdateCustomer(object sender, GridViewUpdateEventArgs e)
{
    cn.Open();
    string sid = ((TextBox)GridView1.FooterRow.FindControl("txtsid")).Text;
    string firstname = ((TextBox)GridView1.FooterRow.FindControl("txtfirstname")).Text;
    string lastname = ((TextBox)GridView1.FooterRow.FindControl("txtlastname")).Text;

    string gender = ((TextBox)GridView1.FooterRow.FindControl("txtgender")).Text;
    string address = ((TextBox)GridView1.FooterRow.FindControl("txtaddress")).Text;
    string phone = ((TextBox)GridView1.FooterRow.FindControl("txtphone")).Text;

    string dob = ((TextBox)GridView1.FooterRow.FindControl("txtdob")).Text;
    string email = ((TextBox)GridView1.FooterRow.FindControl("txtemail")).Text;

    //SqlConnection con = new SqlConnection(strConnString);
    SqlCommand cmd = new SqlCommand();
    cmd.CommandType = CommandType.Text;
    cmd.CommandText = " update student set firstname=@firstname,lastname=@lastname,gender=@gender,address=@address,photo=@phone,dob=@dob,email=@email where sid=@sid);" +
    "select sid,firstname,lastname,gender,address,phone,dob,email from student";
    cmd.Parameters.Add("@sid", SqlDbType.Int).Value = sid;
    //cmd.Parameters.Add("@firstname", SqlDbType.VarChar).Value = firstname;
    //cmd.Parameters.Add("@lastname", SqlDbType.VarChar).Value = lastname;
    //cmd.Parameters.Add("@gender", SqlDbType.Int).Value = gender;
    //cmd.Parameters.Add("@address", SqlDbType.VarChar).Value = address;
    //cmd.Parameters.Add("@phone", SqlDbType.VarChar).Value = lastname;
    //cmd.Parameters.Add("@dob", SqlDbType.Int).Value = dob;
    //cmd.Parameters.Add("@email", SqlDbType.VarChar).Value = email;
   // GridView1.DataSource = GetData(cmd);
    cmd.ExecuteNonQuery();

    GridView1.DataBind();
    cn.Close();
    fillgrid();
}

here the fillgrid() is use for binding data from table to grid view..
now that data is shown in the grid view but during update process it is shown error like..
ExecuteNonQuery: Connection property has not been initialized.
so what is the solution ????

Posted 24-Jul-12 4:17am

pandya purvang

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[no name] 24-Jul-12 10:22am

Your SqlCommand object's connection property has not been set.

3 solutions

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Santhosh Kumar Jayaraman · Answer 1 · 2012-07-24T04:19:00

Solution 1

Where is your connection property "cn"?

Initialise it inside constructor.

public class test
{

SqlConnection cn;

test()
{
cn=new SqlCOnnection("connectionstringcomeshere");
}

Posted 24-Jul-12 4:19am

Santhosh Kumar Jayaraman

Comments

pandya purvang 24-Jul-12 10:23am

yaaa i have already provide connection string ...
look like..
public partial class datalist : System.Web.UI.Page
{
SqlConnection cn = null;
protected void Page_Load(object sender, EventArgs e)
{
cn=new SqlConnection(@"Data Source=PURVPARI-PC\SQLEXPRESS;Initial Catalog=demomydb;Integrated Security=True ");
if (!Page.IsPostBack)
{
fillgrid();

}
}
protected void fillgrid()
{
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter("select * from student", cn);
//string strQuery = "select sid,firstname,lastname,gender,address,phone,dob,email" +

//SqlCommand cmd = new SqlCommand(strQuery);
da.Fill(dt);
GridView1.DataSource = dt;
GridView1.DataBind();

}

Santhosh Kumar Jayaraman 24-Jul-12 10:25am

cmd.Connection=cn;

pandya purvang 24-Jul-12 10:49am

okkk that error is solved thanks...
but new error is like..
Failed to convert parameter value from a String to a Int32.
so what can i do?

Santhosh Kumar Jayaraman 24-Jul-12 10:52am

cmd.Parameters.Add("@sid", SqlDbType.Int).Value = Convert.ToInt32(sid);

Santhosh Kumar Jayaraman · Answer 2 · 2012-07-24T04:26:00

try this.

C#

protected void UpdateCustomer(object sender, GridViewUpdateEventArgs e)
{
    cn.Open();
    string sid = ((TextBox)GridView1.FooterRow.FindControl("txtsid")).Text;
    string firstname = ((TextBox)GridView1.FooterRow.FindControl("txtfirstname")).Text;
    string lastname = ((TextBox)GridView1.FooterRow.FindControl("txtlastname")).Text;

    string gender = ((TextBox)GridView1.FooterRow.FindControl("txtgender")).Text;
    string address = ((TextBox)GridView1.FooterRow.FindControl("txtaddress")).Text;
    string phone = ((TextBox)GridView1.FooterRow.FindControl("txtphone")).Text;

    string dob = ((TextBox)GridView1.FooterRow.FindControl("txtdob")).Text;
    string email = ((TextBox)GridView1.FooterRow.FindControl("txtemail")).Text;

    //SqlConnection con = new SqlConnection(strConnString);
    SqlCommand cmd = new SqlCommand();
    cmd.Connection=cn;
    cmd.CommandType = CommandType.Text;
    cmd.CommandText = " update student set firstname=@firstname,lastname=@lastname,gender=@gender,address=@address,photo=@phone,dob=@dob,email=@email where sid=@sid);" +
    "select sid,firstname,lastname,gender,address,phone,dob,email from student";
    cmd.Parameters.Add("@sid", SqlDbType.Int).Value = sid;
    //cmd.Parameters.Add("@firstname", SqlDbType.VarChar).Value = firstname;
    //cmd.Parameters.Add("@lastname", SqlDbType.VarChar).Value = lastname;
    //cmd.Parameters.Add("@gender", SqlDbType.Int).Value = gender;
    //cmd.Parameters.Add("@address", SqlDbType.VarChar).Value = address;
    //cmd.Parameters.Add("@phone", SqlDbType.VarChar).Value = lastname;
    //cmd.Parameters.Add("@dob", SqlDbType.Int).Value = dob;
    //cmd.Parameters.Add("@email", SqlDbType.VarChar).Value = email;
   // GridView1.DataSource = GetData(cmd);
    cmd.ExecuteNonQuery();

    GridView1.DataBind();
    cn.Close();
    fillgrid();
}

bbirajdar · Answer 3 · 2012-07-24T04:26:00

Solution 3

When you create a new SqlCommand object , then you need to assign the SqlConnection object to it

C#

SqlConnection con = new SqlConnection(strConnString);
SqlCommand cmd = new SqlCommand();
cmd.Connection=con ; //Add this line to your code
cmd.CommandType = CommandType.Text;

Posted 24-Jul-12 4:26am

bbirajdar

Updated 24-Jul-12 4:27am

v2

Comments

pandya purvang 24-Jul-12 10:42am

okk i will try

pandya purvang 24-Jul-12 10:49am

okkk that error is solved thanks...
but new error is like..
Failed to convert parameter value from a String to a Int32.

connection property has not been initialised

3 solutions

Solution 1

Solution 2

Solution 3

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