下拉不採取SelectedValue

-1

我有一個奇怪的問題。我填下拉蒙山這個代碼下拉不採取SelectedValue

MySqlCommand cmdAreaPassive = new MySqlCommand(); 
    cmdAreaPassive.CommandText = "Select BolgeID, BolgeAdi, AktiPasif "; 
    cmdAreaPassive.CommandText += "From tbl_bolgeler "; 
    cmdAreaPassive.CommandText += "Where AktiPasif = 1 "; 
    cmdAreaPassive.CommandText += "Order By BolgeAdi ASC "; 
    cmdAreaPassive.Connection = con; 

    MySqlDataAdapter drAreaPassive = new MySqlDataAdapter(cmdAreaPassive); 
    DataSet dsAreaPassive = new DataSet(); 
    drAreaPassive.Fill(dsAreaPassive); 

    ddlAreaDelete.DataSource = dsAreaPassive; 
    ddlAreaDelete.DataTextField = "BolgeAdi"; 
    ddlAreaDelete.DataValueField = "BolgeID"; 
    ddlAreaDelete.DataBind(); 

    Response.Redirect(Request.RawUrl);

，我嘗試使用此代碼

 MySqlCommand cmdDelete = new MySqlCommand(); 
     cmdDelete.CommandText = "Update tbl_bolgeler "; 
     cmdDelete.CommandText += "Set AktiPasif = @AktiPasif "; 
     cmdDelete.CommandText += "Where BolgeID = @BolgeID "; 
     cmdDelete.Connection = con; 

     cmdDelete.Parameters.AddWithValue("@BolgeID", ddlAreaDelete.SelectedItem.Value); 
     cmdDelete.Parameters.AddWithValue("@AktiPasif", "0"); 

     cmdDelete.ExecuteNonQuery();

一切正常，直到選擇對象要刪除的項目。它必須採取選定的值，但它需要選擇的索引。我嘗試SelectedItem.Value和SelectedValue，但它們都不起作用。對不起，我的英語不好，謝謝。

來源

2013-07-14 s.esin

我看不出有任何的下拉填充邏輯 –

可以顯示您的下拉填充代碼!!!! – Raghubar

對不起，我發佈了錯誤的代碼博客，現在我修好了 –

我想，我解決了這個問題

我的代碼是這樣的

cmdDelete.Parameters.AddWithValue("@BolgeID", ddlAreaDelete.SelectedItem.Value);

和我偶然像

 int selectedIndex = ddlAreaDelete.SelectedIndex; 
     if (selectedIndex >= 0) 
     { 
     cmdDelete.Parameters.AddWithValue("@BolgeID",ddlAreaDelete.Items[selectedIndex].Value); 
     }

，但我仍然不知道是什麼原因

來源

2013-07-14 13:39:05

下拉不採取SelectedValue

回答

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