我无法找到错误,为什么我的数据没有插入数据库中。我用的是sql server。 DB是3字段:1)id(int)2)test1(varchar(50))3)test2(varchar(50))。我尝试从文本框和日期插入数据。
private void SaveToDB()
{
string strSql = "";
string[] tos = txtTo.Text.Split(';');
for (int i = 0; i < tos.Length; i++)
{
strSql += "INSERT INTO test (test1, test2) VALUES ('" + txtContent.Text.Trim() + "','" + DateTime.Now.ToString() + "');";
}
using (SqlConnection connection = new SqlConnection(Common.ConnetionString))
{
connection.Open();
SqlTransaction tran = connection.BeginTransaction();
try
{
SqlCommand cmd = new SqlCommand(strSql, connection, tran);
cmd.ExecuteNonQuery();
tran.Commit();
}
catch (Exception e)
{
tran.Rollback();
}
finally
{
connection.Close();
Response.Redirect("messagelist.aspx?flag=2");
}
}
}
但我应该如何更改代码,该参数在循环中工作
答案 0 :(得分:1)
你的循环应该包含整个块。此外,参数化您的查询,以便您不会大开注射。只是一个建议,但我也会在你的sql语句中使用BEGIN TRANSACTION
而不是SqlTransaction tran
,它会为你处理回滚并稍微清理你的代码。
string[] tos = txtTo.Text.Split(';');
for (int i = 0; i < tos.Length; i++)
{
string strSql = "INSERT INTO test (test1, test2) VALUES (@Content, @DateTime);";
using (SqlConnection connection = new SqlConnection(Common.ConnetionString))
{
connection.Open();
SqlTransaction tran = connection.BeginTransaction();
try
{
using (SqlCommand cmd = new SqlCommand(strSql, connection, tran))
{
cmd.Parameters.AddWithValue("@Content", txtContent.Text.Trim());
cmd.Parameters.AddWithValue("@DateTime", DateTime.Now.ToString());
cmd.ExecuteNonQuery();
tran.Commit();
}
}
catch (Exception e)
{
tran.Rollback();
}
finally
{
connection.Close();
Response.Redirect("messagelist.aspx?flag=2");
}
}
}