update datatable to a dataset then update dataset to database

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Hi,

Can anyone tell me how to update a datatable to a dataset..?

C#

dt = ds.Tables["Resource"];
        DataRow row = dt.NewRow();
        row["res_Name"] = name;
        row["res_Password"] = pass;
        row["role_name"] = rol;
        dt.Rows.Add(row);

I want to update this dt(datatable) to ds(dataset) here.
I dont want to update database.

Next, in save button click event, I want to update dataset to database.

Please help me.

Thanks.

Posted 15-Nov-10 20:27pm

shwetha_m6

Updated 15-Nov-10 22:26pm

Dalek Dave

v2

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Dalek Dave 16-Nov-10 4:26am

Edited for Grammar, Spelling and Readability.

1 solution

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thatraja · Accepted Answer · 2010-11-15T21:37:00

Solution 1

You can remove the old table

ds.Tables.Remove(dt);

or by name:

ds.Tables.Remove("Resource");

You can later add the table

ds.Tables.Add(dt);

or by name:

ds.Tables.Add("Resource");

Now you can loop the rows of Datatable/Dataset you can generate query or XML & then you can pass it to your stored procedure, then you can save it. So try...if you have any doubt then let us know

Posted 15-Nov-10 21:37pm

thatraja

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shwetha_m6 16-Nov-10 4:28am

Hi, thanks very much... as u said i removed table from ds after assingning it to dt. and i tried to add it again to ds but its not showing previously updated row as i am trying to add 2 rows one after another, it'l show only a last row which is added..!

thatraja 16-Nov-10 4:32am

better you show the code on your question so that we can help you quickly

shwetha_m6 16-Nov-10 6:00am

This is the exact code which m using..

public DataSet Getdataset()
{
try
{
con.Open();
ds.Clear();
com = new SqlCommand("select * from Role_Master", con);
ra = com.ExecuteNonQuery();
da = new SqlDataAdapter(com);
da.Fill(ds, "Role");
com = new SqlCommand("select * from Add_Resource", con);
ra = com.ExecuteNonQuery();
da = new SqlDataAdapter(com);
da.Fill(ds, "Resource");
//GridView1.DataSource = ds.Tables[1];
//GridView1.DataBind();
con.Close();
return ds;
}
catch (Exception e)
{
con.Close();
return ds;
}
}

public DataTable Addusers(String name, String pass, String rol)
{
//dt.Clear();
DataSet ds3 = new DataSet();
ds3 = Getdataset();
// Create a data table object and add a new row
dt = ds3.Tables["Resource"];
ds3.Tables.Remove(dt);
DataRow row = dt.NewRow();
row["res_Name"] = name;
row["res_Password"] = pass;
row["role_name"] = rol;
dt.Rows.Add(row);
ds3.Tables.Add(dt);
//// Update data adapter
//da = new SqlDataAdapter("Select * from dt", con);
//da.Update(ds, "Resource");
//dt.Clear();
dt = ds3.Tables["Resource"];
return dt;
}

thatraja 16-Nov-10 6:23am

since dt as still reference of ds3.Tables["Resource"] so you may create new table like dt1 & add rows to that then you can add the table dt1 to dataset ds3