使用c將文本框值插入到sql服務器＃

Question

我需要將文本框值添加到SQL Server數據庫表。下面是我的代碼：

private void button1_Click(object sender, EventArgs e) 
{ 
    string str = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\timetablesystem.mdf;Integrated Security=True;User Instance=True"; 
    SqlConnection con = new SqlConnection(str); 
    string qry = "insert into SubjectMaster (SubjectName) values (@TxtSubjectName)"; 
    con.Open(); 
    SqlCommand cmd = new SqlCommand(qry, con); 
    cmd.CommandType = CommandType.Text; 
    cmd.Parameters.AddWithValue("@TxtSubjectName", TxtSubjectName.Text); 
    cmd.ExecuteNonQuery(); 
    MessageBox.Show("Added Successfully!!"); 
    con.Close(); 
} 

不過，數據應在表中未添加......請幫我... 感謝烏拉圭回合的幫助...

Answer 1

首先嚐試調試你的查詢，如果它的工作原理我認爲你的數據庫連接不起作用。

string str = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\timetablesystem.mdf;Integrated Security=True;User Instance=True"; 

是否應該是這個'。'數據源後Data Source=.\\SQLEXPRESS

Answer 2

試試這個

 SqlConnection con = new SqlConnection(@"Data Source=SL-20\SQLEXPRESS;Initial Catalog=TestDB;User ID=sa;Password=sl123;"); 
     string query = " insert into name(name)values('" + TextboxTest.Text + "')"; 
     con.Open(); 
     SqlCommand cmd = new SqlCommand(query, con); 
     cmd.ExecuteNonQuery(); 
     con.Close(); 

Answer 3

試試這個，告訴我什麼是郵件信息內容

private void button1_Click(object sender, EventArgs e) 
{ 
    string str = "Server=.\SQLEXPRESS;Database=TestDB;Trusted_Connection=True;"; 
    using(SqlConnection con = new SqlConnection(str)){ 
          try{ 
           con.Open(); 
           string qry = "insert into SubjectMaster (SubjectName) values (@TxtSubjectName)"; 
           SqlCommand cmd = new SqlCommand(qry, con); 
           cmd.CommandType = CommandType.Text; 
           cmd.Parameters.AddWithValue("@TxtSubjectName", TxtSubjectName.Text); 
           cmd.ExecuteNonQuery(); 
           MessageBox.Show("Added Successfully!!"); 
           } 
          catch{ 
           MessageBox.Show("connection is failed!!"); 
           } 
                 } 
}