嗨,
它显示了这样的错误......
错误: - 从对象类型System.Data.DataRowView到已知的托管提供程序本机类型不存在映射。我是错误部分的基础............. !!
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");
}
}
答案 0 :(得分:1)
SelectedValue是类的一个对象,用作DataRow的DataRowView视图,应该以相同的方式使用,即: DataRowView drv =(DataRowView)comboBox1.SelectedValue;
答案 1 :(得分:0)
我自己解决..... !!
command.Parameters.AddWithValue("@Course", comboBox1.Text);
command.Parameters.AddWithValue("@Branch", comboBox2.Text);
command.Parameters.AddWithValue("@Semester", comboBox3.Text);
command.Parameters.AddWithValue("@Section", comboBox4.Text);
现在正在工作:D 我可以轻松插入数据...... !!!
如果你没有犯错,那么你什么都不做