How to get the data from datagridview and update it to the database?

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Hi guys.

I have a datagridview that displays the 50 percent of the total number of the records in the database. Now, I need to update their section name in tblclass, tblstudentinfo. I do not know how. Can anyone help me?

Here is my code:

p_table1 = new DataTable();
              p_table1.Clear();
              string questa = "SELECT  TOP 50 Percent * from tblStudentInformation Where GradeLevel ='" + label2.Text + "' and Result >= 85  and SectionName IS NULL";
              SqlDataAdapter rad = new SqlDataAdapter(questa, conn);
              rad.Fill(p_table1);
              dataGridView2.DataSource = p_table1;

Posted 18-Jan-15 21:43pm

DarkDreamer08

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Sergey Alexandrovich Kryukov 19-Jan-15 3:44am

Such questions are asked probably more often than weekly. Why not looking at existing questions and answers?
—SA

DarkDreamer08 19-Jan-15 3:54am

i have tried looking for articles and I cannot find any that will help me to solve my problem. I am sorry if I am such an idiot in terms of that. I just wanted to learn. I just needed assistance and advise from others :(

Sergey Alexandrovich Kryukov 19-Jan-15 13:42pm

Please don't say such bad words about yourself. We all have some hard time learning from time to time. Just be patient. I remember that there were many, many answers (I did not mean articles) to the questions very similar to yours.
—SA

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jaimin85 · Answer 1 · 2015-01-18T23:07:00

p_table1 = new DataTable();
p_table1.Clear();
string questa = "SELECT TOP 50 Percent * from tblStudentInformation Where GradeLevel ='" + label2.Text + "' and Result >= 85 and SectionName IS NULL";
SqlDataAdapter rad = new SqlDataAdapter(questa, conn);
rad.Fill(p_table1);
dataGridView2.DataSource = p_table1;

string data= "update tblStudentInformation set SectionName ='your update value' where Where GradeLevel ='" + label2.Text + "' and Result >= 85 and SectionName IS NULL";
rad = new SqlDataAdapter(data, conn);
rad.Fill(p_table1);
dataGridView2.DataSource = p_table1;