Question

我尝试使用此代码显示sql数据库中的一些信息。但是我看不到gridview中的数据。我怎么解决？另外，我没有错误。

protected void Button1_Click(object sender, EventArgs e)
{
    SqlConnection cnn = new SqlConnection("Server=CAN-PC; Database=SMS; UID=SA;  PWD=delidana1963");
    string sql = "";
    sql = @"select Orginator,RecordDate, (select COUNT(TurkcellID) from SmsStore ";

 //   txttarih.Text = Calendar1.SelectedDate.ToString();
    var tarih1 = String.Format("{0:yyyy-MM-dd hh:mm}", Calendar1.SelectedDate.Date);
    var tarih2 = String.Format("{0:yyyy-MM-dd hh:mm}", Calendar2.SelectedDate.Date);


    if (Calendar1.SelectedDate != null && Calendar2.SelectedDate != null)
        sql += "where RecordDate between '" +tarih1 + "' and  '" + tarih2 + "'";
    else if (Calendar1.SelectedDate != null && Calendar2.SelectedDate == null)
        sql += "where RecordDate between '" + tarih1 + "' and '" + DateTime.Now + "'";
    sql += ") as toplammsj,";

    sql += "(select COUNT(TurkcellID) from SmsStore where TurkcellID=1 ";
    if (Calendar1.SelectedDate != null && Calendar2.SelectedDate != null)
        sql += "and RecordDate between '" + tarih1 + "' and '" + tarih2+ "'";
    else if (Calendar1.SelectedDate != null && Calendar2.SelectedDate == null)
        sql += "and RecordDate between '" + tarih1 + "' and '" + DateTime.Now + "'";
    sql += ") as giden,";

    sql += " (select COUNT(TurkcellID) from SmsStore where TurkcellID=0 ";
    if (Calendar1.SelectedDate != null && Calendar2.SelectedDate != null)
        sql += "and RecordDate between '" + tarih1 + "' and '" + tarih2 + "'";
    else if (Calendar1.SelectedDate != null && Calendar2.SelectedDate == null)
        sql += "and RecordDate between '" + tarih1 + "' and '" + DateTime.Now + "'";
    sql += ") as gitmeyen from SmsStore ";

    if (Calendar1.SelectedDate != null && Calendar2.SelectedDate != null)
        sql += "where RecordDate between '" + tarih1+ "' and '" + tarih2 + "'";
    else if (Calendar1.SelectedDate != null && Calendar2.SelectedDate == null)
        sql += "where RecordDate between '" + tarih1 + "' and '" + DateTime.Now + "'";

    SqlDataAdapter adp = new SqlDataAdapter(sql, cnn);
    DataTable dt = new DataTable();
    adp.Fill(dt);
    GridView1.DataSource = dt;
    GridView1.DataBind();
    GridView1.DataMember = "dt";
}

请帮我解决这个问题。谢谢大家。

Answer 1

这是WPF GridView 还是Windows Forms DataGridView？ WPF GridView没有DataSource属性或DataBind（）方法。对于DataGridView，如果 DataSource 是DataTable，则不需要使用DataBind（）或设置DataMember属性，就像您所做的那样。

此外，出于调试目的，在行adp.Fill(dt)之后添加断点。将光标放在dt上并检查属性以确定Rows.Count是否大于0.如果您的SQL搞砸了，您可能不会首先从数据库中获取任何数据。

datagrid视图未显示数据

1 个答案: