我想实现查询伪码的显示真伪的同时显示此伪码已经被查询了几次，总报错“无法将类型object隐式转换为bool”
protected void Page_Load(object sender, EventArgs e)
{
}
protected void submit_Click(object sender, EventArgs e)
{
string connStr = @"Server=数码10\SQLEXPRESS;Database=demo;Persist Security Info=True;User ID=sa;Password=123";//链接数据库
using (SqlConnection conn = new SqlConnection(connStr))
{
conn.Open();
string strsql1 = "select * from Security_code where valid=1 ";
SqlDataAdapter da = new SqlDataAdapter(strsql1, conn);
DataSet ds = new DataSet();
da.Fill(ds, "table");
int j;
if (ds.Tables[0].Rows[0]["times"] = DBNull.Value)
j = 0;
else j = Convert.ToInt32(ds.Tables[0].Rows[0]["times"]) + 1;
if (ds.Tables[0].Rows.Count > 0)
{
string commandText = "update Security_code set times =" + j; // (Convert.ToInt32(ds.Tables[0].Rows[times]) + 1);
//string commandText = "update Security_code set times = (Convert.ToInt32(ds.Tables[0].Rows[times]) + 1)";
SqlCommand command = new SqlCommand(commandText, conn);
command.ExecuteNonQuery();
}
}
String queryCode = this.code.Text.ToString().Trim();
string parrent = "^([0-9]{4})([0-9]{4})([0-9]{4})([0-9]{4})$";
if (!Regex.IsMatch(queryCode, parrent))
{
this.ClientScript.RegisterStartupScript(this.GetType(), "提示", "<script language ='javascript'>alert('输入的防伪码格式不正确!');</script>");
return;
}
queryCode = queryCode.Replace("-", "");
string sqlcode = NewCompileCode.TransformSqlCode(queryCode);
int i = ConnectionSql.queryCode(sqlcode);
if (i!=0)
this.ClientScript.RegisterStartupScript(this.GetType(), "提示", "<script language ='javascript'>alert('该防伪码无效');</script>");
else
this.ClientScript.RegisterStartupScript(this.GetType(), "提示", "<script language ='javascript'>alert('有效的防伪码');</script>");
}
}
--------------------编程问答-------------------- int j;
if (ds.Tables[0].Rows[0]["times"] = DBNull.Value)
j = 0;
else j = Convert.ToInt32(ds.Tables[0].Rows[0]["times"]) + 1;
if (ds.Tables[0].Rows.Count > 0)
{
string commandText = "update Security_code set times =" + j; // (Convert.ToInt32(ds.Tables[0].Rows[times]) + 1);
//string commandText = "update Security_code set times = (Convert.ToInt32(ds.Tables[0].Rows[times]) + 1)";
==>
string commandText = "update Security_code set times =isnull(times ,0) + 1 Where valid="+ xxxid
--------------------编程问答-------------------- 什么意思 --------------------编程问答-------------------- if (ds.Tables[0].Rows[0]["times"] = DBNull.Value) 是2个等于号吧 --------------------编程问答-------------------- 断点一下就能看的到啊。。。唉
应该是这个问题。结贴咯。。。。 --------------------编程问答-------------------- 断点走一下
(Convert.ToInt32(ds.Tables[0].Rows[times]) + 1);
改为
(Convert.ToInt32(ds.Tables[0].Rows["times"]) + 1);
--------------------编程问答--------------------
结什么贴啊一直没解决呢好不
补充：.NET技术 , ASP.NET
