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爲了更好地解釋我的個人網站項目的問題,我將從我創建的數據庫開始。該表被稱爲guitarItems。 SQL語句不能使用asp.net工作嗎?
這張表是我在哪裏得到數據在網頁上顯示圖像和吉他的細節。爲了做到這一點,我創建了一個名爲「GetGuitarItems」的方法來執行和讀取sql語句。
public static ArrayList GetGuitarItems(string itemCategory)
{
ArrayList list = new ArrayList();
string query = string.Format("SELECT * FROM guitarItems WHERE brand LIKE '{0}'", itemCategory);
try
{
conn1.Open();
command1.CommandText = query;
SqlDataReader reader = command1.ExecuteReader();
while (reader.Read())
{
int id = reader.GetInt32(0);
string type = reader.GetString(1);
string brand = reader.GetString(2);
string model = reader.GetString(3);
double price = reader.GetDouble(4);
string itemimage1 = reader.GetString(5);
string itemimage2 = reader.GetString(6);
string description = reader.GetString(7);
string necktype = reader.GetString(8);
string body = reader.GetString(9);
string fretboard = reader.GetString(10);
string fret = reader.GetString(11);
string bridge = reader.GetString(12);
string neckpickup = reader.GetString(13);
string bridgepickup = reader.GetString(14);
string hardwarecolor = reader.GetString(15);
GuitarItems gItems = new GuitarItems(id, type, brand, model, price, itemimage1, itemimage2, description, necktype, body,
fretboard, fret, bridge, neckpickup, bridgepickup, hardwarecolor);
list.Add(gItems);
}
}
finally
{
conn1.Close();
}
return list;
}
接着的部分是這個代碼,其中你顯示已從數據庫中檢索的數據。
public partial class Pages_GuitarItems1 : System.Web.UI.Page
{
private string brandType = "Ibanez";
private int x = 0;
protected void Page_Load(object sender, EventArgs e)
{
FillPage();
}
private void FillPage()
{
ArrayList itemList = new ArrayList();
ArrayList itemListPage = new ArrayList();
if (!IsPostBack)
{
itemList = ConnectionClassGuitarItems.GetGuitarItems("%");
}
else
{
itemList = ConnectionClassGuitarItems.GetGuitarItems(brandType);
}
StringBuilder sb = new StringBuilder();
foreach (GuitarItems gList in itemList)
{
itemListPage.Add("GuitarItemsIbanezDetails" + (x + 1) + ".aspx");
sb.Append(
string.Format(
@"
<div class='one-two'>
<a href='{3}' runat='server'><img runat='server' src='{0}'/></a>
<div class='content'>
<div id='label'>{1} {2}</div>
</div>
</div>", gList.ItemImage1, gList.Brand, gList.Model, itemListPage[x]));
x++;
}
lblOutput.Text = sb.ToString();
}
}
現在的問題是它顯示數據庫中的每個吉他項目。從上面的代碼可以看出,我試圖展示的只是帶有品牌「Ibanez」的吉他物品。我對foreach代碼有懷疑,但至少現在,GetGuitarItemsMethod被設計爲僅獲得Ibanez吉他項目,並且數據將被傳遞到ArrayList itemList變量以用於顯示。我也檢查了sql語句,看起來是正確的。希望你們能幫助我解決這個問題。
[注意小鮑比表。(https://xkcd.com/327/) –
你有沒有注意到這條線? 'itemList = ConnectionClassGuitarItems.GetGuitarItems(「%」);' 並使用參數化查詢。 – aquinas
只需調試你的代碼來檢查你從數據庫中得到了什麼。另外我想你想'LIKE'%{0}%'' –