爲什麼沒有在我的DataGridView中顯示？

我試圖初始化一個DataGridView對象。我所做的只是將對象添加到我的屏幕而不更改任何屬性。我有用戶選擇它所在的面板時運行的代碼。該代碼看起來像這樣...爲什麼沒有在我的DataGridView中顯示？

DataTable tbl = new DataTable(); 
string query = "SELECT viewfolder, status FROM Folders WHERE username = '" + Globals.usrName + "' ORDER BY viewfolder"; 

SqlConnection connect = new SqlConnection(@"Data Source=(LocalDB)\v11.0;" + 
    @"AttachDbFilename=C:\Development\C-Sharp\LockItUp\Lockitup.mdf;Integrated Security=True"); 

SqlCommand cmd = new SqlCommand(query, connect); 

connect.Open(); 
try 
{ 
    SqlDataAdapter dAdapt = new SqlDataAdapter(cmd); 
    dAdapt.Fill(tbl); 
} 
catch (Exception ex) 
{ 
    MessageBox.Show(ex.Message); 
    return; 
} 
connect.Close(); 

dataGridView1.DataSource = tbl;

那麼，有沒有其他的代碼，我要補充或我必須設置看對電網的數據顯示屬性？謝謝您的幫助。

來源

2016-03-02 Bob Gatto

u能看到的列標題？你確定查詢返回一些數據嗎？因爲你的代碼似乎沒問題.. – Olivarsham

我甚至沒有看到列標題。 –

您需要設置['dataGridView1.AutoGenerateColumns = true;']（https://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.autogeneratecolumns%28v=vs.110%29。 aspx）或在代碼中添加你想要的列。 – TaW

你可以嘗試使用此代碼：

void FillData() 
{ 

    using (SqlConnection c = new SqlConnection(
    @"Data Source=(LocalDB)\v11.0;" + 
@"AttachDbFilename=C:\Development\C-Sharp\LockItUp\Lockitup.mdf;Integrated Security=True")) 
    { 
    c.Open(); 

      string query = "SELECT viewfolder, status FROM Folders WHERE username = '" + Globals.usrName + "' ORDER BY viewfolder"; 
    using (SqlDataAdapter a = new SqlDataAdapter(
     query , c)) 
    { 
     DataTable tbl = new DataTable(); 
     a.Fill(tbl); 
     dataGridView1.DataSource = tbl; 
    } 
    } 
}

來源

2016-03-02 05:48:04 Olivarsham

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