下面的代码是我的代码示例如何连接和添加文本框我现在想要的是如何添加与dropdownlist ...代码示例如何通过下拉列表添加人请???C#asp.net SQL如何通过dropdownlist将新值添加到数据库?
public partial class SQL_Test : System.Web.UI.Page
{
SqlConnection myConnection;
DataSet dataSet;
string sql;
SqlDataAdapter dataAdapter;
protected void Page_Load(object sender, EventArgs e)
{
myConnection = new SqlConnection("trusted_connection=yes;" + "database=DataBaseConnection;" + "connection timeout=30;");
dataSet = new DataSet();
sql = "SELECT Firstname,Surname FROM BasicInfo";
dataAdapter = new SqlDataAdapter(sql, myConnection);
//fill dataset
dataAdapter.Fill(dataSet, "datafill");
//bind database to gridviwe
GridView1.DataSource = dataSet;
GridView1.DataBind();
}
protected void Button1_Click(object sender, EventArgs e)
{
myConnection.Open();
SqlCommand AddCommand = new SqlCommand("INSERT INTO BasicInfo (Firstname,Surname) values(@a,@b)", myConnection);
if (TextBox1.Text != null && TextBox2.Text != null)
{
//TextBox set Parameters
AddCommand.Parameters.AddWithValue("@a", TextBox1.Text);
AddCommand.Parameters.AddWithValue("@b", TextBox2.Text);
//Execute Query
AddCommand.ExecuteNonQuery();
//emptied textbox's
TextBox1.Text = "";
TextBox1.Text = "";
//Redirect
Response.Redirect("SQL-Test.aspx");
}
//close connection
myConnection.Close();
}
“添加一个下拉列表”?这是什么意思 –
通过下拉列表给数据库添加新的值 –
@William:我不明白你的问题,但是你的代码存在错误。您应该始终检查IsPostback,并且只绑定if(!IsPostback){...} – TCM