title: ERROR : No mapping exists from object type System.Data.DataRowView to a known managed provider native type
body: <p><strong>Hi, 
  It shows the error like this......<br>
  Error:- No mapping exists from object type System.Data.DataRowView to a known managed provider native type. I am underlying the error part.............!!</strong></p>
  
  <pre><code>    private void button1_Click(object sender, EventArgs e)
      {
          String connectionString = @"Connection String Here ";
          SqlConnection connection = new SqlConnection(connectionString);
          connection.Open();
  
          // INSERTION 
          string query = "INSERT INTO StudentMaster(RollNo,Name,Gender,FathersName,Course,Branch,Semester,Section,ContactNo1,ContactNo2,EmailId) VALUES ('" + textBox1.Text + "', '" + textBox2.Text + "', @Gender,'" + textBox3.Text + "', '" + comboBox1.Text + "','" + comboBox2.Text + "', '" + comboBox3.Text + "', '" + comboBox4.Text + "','" + textBox4.Text + "', '" + textBox5.Text + "', '" + textBox6.Text + "'";
          SqlCommand command = new SqlCommand(query, connection);
  
          // Radio button
          if (radioButton1.Checked)
          {
              command.Parameters.AddWithValue("@Gender", "Male");
          }
          else
          {
              command.Parameters.AddWithValue("@Gender", "Female");
          }
  
          // value store for combobox
          //command.Parameters.AddWithValue("@DOB", dateTimePicker1.Text);
          command.Parameters.AddWithValue("@Course", comboBox1.SelectedItem);
          command.Parameters.AddWithValue("@Branch", comboBox2.SelectedItem);
          command.Parameters.AddWithValue("@Semester", comboBox3.SelectedItem);
          command.Parameters.AddWithValue("@Section", comboBox4.SelectedItem);
  
          command.ExecuteNonQuery();
          connection.Close();
  
          if (MessageBox.Show("Do you really want to INSERT??", "Insert", MessageBoxButtons.OKCancel) == DialogResult.OK)
          {
              MessageBox.Show("INSERTED");
          }
      }
  </code></pre>