how to solve this for insert query

Question

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ERROR:-No mapping exists from object type System.Data.DataRowView to a known managed provider native type.

code following:-

C#

con.Open();
           SqlCommand cmd = new SqlCommand("addprd1", con);
           cmd.CommandType = CommandType.StoredProcedure;
           cmd.Connection = con;
           cmd.Parameters.AddWithValue("@id", label10.Text);
           cmd.Parameters.AddWithValue("@srno", textBox1.Text);
           cmd.Parameters.AddWithValue("@itm", comboBox1.SelectedItem);
           cmd.Parameters.AddWithValue("@make", comboBox2.SelectedItem);
           cmd.Parameters.AddWithValue("@dop", dateTimePicker1.Text);
           cmd.Parameters.AddWithValue("@year", comboBox3.SelectedItem);
           cmd.Parameters.AddWithValue("@mno", textBox6.Text);
           cmd.Parameters.AddWithValue("@srm", textBox7.Text);
           cmd.Parameters.AddWithValue("@off", textBox9.Text);
           cmd.Parameters.AddWithValue("@usr", textBox8.Text);
           cmd.ExecuteNonQuery();
           con.Close();
           label10.Visible = true;
           MessageBox.Show("Insert Successfully");
           Bind();
           label10.Visible = false;
           Clear();

Edit : Code Block added

Posted 30-Jun-14 21:48pm

Nishant.Chauhan80

Updated 30-Jun-14 21:50pm

King Fisher

v2

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Shameel · Accepted Answer · 2014-06-30T21:54:00

Solution 1

comboBox1.SelectedItem may not necessarily be a string, the data type depends on how the control was actually data bound, try comboBox1.Text instead or cast the SelectedValue to the appropriate type.

DataRowView drv = (DataRowView) comboBox1.SelectedValue

Posted 30-Jun-14 21:54pm

Shameel

Comments

Nishant.Chauhan80 1-Jul-14 4:53am

Thanks combobox1.text its working

OriginalGriff · Accepted Answer · 2014-06-30T21:56:00

Just a guess, but it's probably the combobox values.
It looks like you have bound data to the combobox, and as a result the SelectedItem is a DataRowView object (which it will be).
You need to get the information from that row which matches the datatype in your DB - I can't tell you exactly what to do as I have no idea what data you have loaded, or what data you have in your DB.