C＃沒有從對象類型System.Web.UI.WebControls.TextBox到已知託管提供程序本機類型的映射

Question

請幫助！我在瀏覽器中查看了一次該錯誤！ ：

不存在從對象類型System.Web.UI.WebControls.TextBox到已知託管提供程序本機類型的映射。

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SqlConnection conn = new SqlConnection(); 
SqlCommand cmd = new SqlCommand(); 

conn.ConnectionString = ConfigurationManager.ConnectionStrings[1].ToString(); 
cmd.Connection = conn; 
cmd.CommandType = CommandType.StoredProcedure; 
cmd.CommandText = "ManageMember"; 

cmd.Parameters.AddWithValue("@check", "a"); 
cmd.Parameters.AddWithValue("@username", UserNameTxt.Text); 
cmd.Parameters.AddWithValue("@password", PasswordTxt.Text); 
cmd.Parameters.AddWithValue("@name", FullNameTxt.Text); 
cmd.Parameters.AddWithValue("@email", EmailTxt.Text); 
cmd.Parameters.AddWithValue("@phone", PhoneTxt.Text); 
cmd.Parameters.AddWithValue("@company", CompanyTxt); 
cmd.Parameters.AddWithValue("@gender", RdList.SelectedValue); 
cmd.Parameters.AddWithValue("@BirthDate", BirthdateTxt.Text); 
cmd.Parameters.AddWithValue("@question", Quastxt.Text); 
cmd.Parameters.AddWithValue("@answer", AnswTxt.Text); 

conn.Open(); 
cmd.ExecuteNonQuery(); 
lblMsg.Text = "User Added Successfully"; 
conn.Close(); 

Answer 1

變化

cmd.Parameters.AddWithValue("@company", CompanyTxt); 

要

cmd.Parameters.AddWithValue("@company", CompanyTxt.Text); 

然後嫌自己在forehea d。