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我面臨着一個錯誤信息,我不知道我的原因sql語句如行:參數與會話和查詢字符串
DACatPgeVIPLIST.Fill(dsCatPgeVIPLIST);
它顯示這個消息你能幫助我與它:
參數化查詢
(@Country nvarchar(7),@Category nvarchar(4000))SELECT a.[AdsID],
需要參數@Category
,該參數未提供。
代碼:
if (Session["location"] != null)
{
using (SqlConnection CatPgeVIPLISTsqlCON = new SqlConnection(cs))
{
CatPgeVIPLISTsqlCON.Open();
SqlDataAdapter DACatPgeVIPLIST = new SqlDataAdapter("SELECT a.[AdsID], a.[Country], a.[State], a.[City], a.[AdsTit], SUBSTRING(a.[AdsDesc], 1, 70) as AdsDesc, a.[AdsPrice], a.[Img1] FROM [ads] as a INNER JOIN [UserInfo] as u on u.UID = a.UID WHERE a.[Country] = @Country and a.[Category] = @Category and u.VIP = 'Yes'", cs);
string location = Convert.ToString(Session["location"]);
string category = Request.QueryString["category"];
DACatPgeVIPLIST.SelectCommand.Parameters.AddWithValue("@Country", location);
DACatPgeVIPLIST.SelectCommand.Parameters.AddWithValue("@Category", category);
DataSet dsCatPgeVIPLIST = new DataSet();
DACatPgeVIPLIST.Fill(dsCatPgeVIPLIST);
CatPgeVIPLIST.DataSource = dsCatPgeVIPLIST.Tables[0];
CatPgeVIPLIST.DataBind();
}
}
@Grant Winney其與價值,因爲在同一個頁面的另一個列表視圖而顯示的項目,並使用同一個會話位置 – user3716314
什麼是它在執行查詢之前'location'和'category'的值?必要時放置一個斷點。 –
您是否檢查過「類別」有價值? –