我已编写此代码以在数据库中插入一行:
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["earchConnectionString"].ConnectionString);
//string insCmd = "Insert into [node] (title, parent_id, oid, display, linkById, customLinks, contentType) values (@title, @parent_id, @oid, @display, @linkById, @customLinks, @contentType)";
string insCmd = "Insert into [node] (title) values (@title)";
SqlCommand insertUser = new SqlCommand(insCmd, con);
insertUser.Parameters.AddWithValue("@title", TextBoxTitle.Text);
try
{
insertUser.ExecuteNonQuery();
con.Close();
Response.Redirect("addNode.aspx");
Label1.Text = "update success";
}
catch (Exception er)
{
Label1.Text = er.StackTrace;
}
堆栈跟踪:
at System.Data.SqlClient.SqlConnection.GetOpenConnection(String method)
at System.Data.SqlClient.SqlConnection.ValidateConnectionForExecute(String method, SqlCommand command)
at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean async)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at Admin_addNode.Button1_Click(Object sender, EventArgs e)
in c:\inetpub\web1\Admin\addNode.aspx.cs:line 52
任何人都知道这是什么问题?
答案 0 :(得分:4)
在执行con.Open()
ExecuteNonQuery()
con.Open();
insertUser.ExecuteNonQuery();