Gridview表不在asp.net中顯示webform

我只想顯示一些特定查詢的gridview。我試過下面。當查詢中傳遞了錯誤的參數時，此代碼顯示「無數據匹配」，但即使參數正確，也不顯示任何數據。我是新來asp.net。請告訴我，有什麼重要的線，我錯過Gridview表不在asp.net中顯示webform

protected void Page_Load(object sender, EventArgs e) 
    { 
     if (!IsPostBack) 
     { 
      ViewState["Filter"] = "ALL"; 
      BindGrid(); 
     } 
    } 



private void BindGrid() 
    { 
     DataTable dt = new DataTable(); 
     String strConnString = System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString1"].ConnectionString; 
     SqlConnection con = new SqlConnection(strConnString); 
     SqlDataAdapter sda = new SqlDataAdapter(); 
     string query = "SELECT ContactName, City, Country, PostalCode FROM Customers"; 
     SqlCommand cmd = new SqlCommand("SELECT ContactName, City, Country, PostalCode FROM Customers WHERE Country='UK'"); 
     cmd.Connection = con; 
     sda.SelectCommand = cmd; 
     sda.Fill(dt); 
     GridView1.DataSource = dt; 
     GridView1.DataBind(); 
    }

來源

2017-06-04 prateek kalra

的代碼工作，並返回從Northwind數據庫7行到GridView控件。

連接字符串應該是這樣的web.config文件：

<connectionStrings> 
     <add name="NorthwindConnectionString1" connectionString="server=.; database=northwnd; integrated security=true" providerName="System.Data.SqlClient"/> 
</connectionStrings>

來源

2017-06-04 22:12:17

Gridview表不在asp.net中顯示webform

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