Gridview在更新后显示

Question

我正在使用批量更新来更新我的GridView。

首先提示用户选择日期，然后单击按钮以显示这些日期的gridview数据。更新相关的单元格，然后点击保存。

事情是我的Gridview消失后，它得到更新。 我希望Gridview保持显示更新的数据。 我该怎么做？

代码段：

string connStr = ConfigurationManager.ConnectionStrings["bbsConnectionString"].ConnectionString; 
     using (SqlConnection Con = new SqlConnection(connStr)) 
     { 

      SqlDataAdapter sdr = new SqlDataAdapter(str, Con); 

      sdr.SelectCommand.Parameters.AddWithValue("@startdate", startdate); 
      sdr.SelectCommand.Parameters.AddWithValue("@enddate", enddate); 
      DataTable dt = new DataTable(); 
      sdr.Fill(dt); 
      if (dt.Rows.Count > 0) 
      { 
       GridView1.DataSource = dt; 
       GridView1.DataBind(); 
       Button2.Visible = true; 
      } 



     } 

    protected void Button2_Click(object sender, EventArgs e) 
    { 
     foreach (GridViewRow row in GridView1.Rows) 
     { 



      TextBox dtm = row.FindControl("DtmTextBox") as TextBox; 


      string connStr = ConfigurationManager.ConnectionStrings["bbsConnectionString"].ConnectionString; 
      using (SqlConnection Con = new SqlConnection(connStr)) 
      { 
       Con.Open(); 
       SqlCommand cmd = new SqlCommand("Update tblAvailable set intqty=@intQty, curprice=@curprice where intresortid=@intresortid and dtm=@dtm and strroomtype=@strroomtype", Con); 



       // cmd.Parameters.AddWithValue("@dtm", DateTime.ParseExact(dtm.Text.Trim(), "dd/M/yyyy", System.Globalization.CultureInfo.InvariantCulture)); 

       cmd.ExecuteNonQuery(); 
       GridView1.EditIndex = -1; 
       GridView1.DataBind(); 
       GridView1.Visible = true; 




      } 

Answer 1

你必须绑定方法被调用

GridView1.DataSource = dt; 
GridView1.DataBind(); 

之前这里你绑定更新后网格而不是GridView1分配数据表的数据表/数据集分配给数据源。数据源。你可以在这里调用DataGrid方法，而不是像这样绑定。

private void FillGrid() 
{ 
string connStr = ConfigurationManager.ConnectionStrings["bbsConnectionString"].ConnectionString; 
     using (SqlConnection Con = new SqlConnection(connStr)) 
     { 

      SqlDataAdapter sdr = new SqlDataAdapter(str, Con); 

      sdr.SelectCommand.Parameters.AddWithValue("@startdate", startdate); 
      sdr.SelectCommand.Parameters.AddWithValue("@enddate", enddate); 
      DataTable dt = new DataTable(); 
      sdr.Fill(dt); 
      if (dt.Rows.Count > 0) 
      { 
       GridView1.DataSource = dt; 
       GridView1.DataBind(); 
       Button2.Visible = true; 
      } 
     } 
} 
//You should as call the method FillGrid that loads data and bind grid previously  

      cmd.ExecuteNonQuery(); 
      GridView1.EditIndex = -1; 
      //GridView1.DataBind(); 
      FillGrid(); 
      GridView1.Visible = true; 

删除结合以前

Answer 2

我已经使用下面的代码电网这些语句并调用方法。我会努力。你应该再调用这个方法中，你按日期显示网格视图

public void DisplyGridview(){ 

string connStr = ConfigurationManager.ConnectionStrings["bbsConnectionString"].ConnectionString; 
    using (SqlConnection Con = new SqlConnection(connStr)) 
    { 

     SqlDataAdapter sdr = new SqlDataAdapter(str, Con); 

     sdr.SelectCommand.Parameters.AddWithValue("@startdate", startdate); 
     sdr.SelectCommand.Parameters.AddWithValue("@enddate", enddate); 
     DataTable dt = new DataTable(); 
     sdr.Fill(dt); 
     if (dt.Rows.Count > 0) 
     { 
      GridView1.DataSource = dt; 
      GridView1.DataBind(); 
      Button2.Visible = true; 
      } 



    } 

} 保护无效GridView1_RowUpdating（对象发件人，GridViewUpdateEventArgs E） {

foreach (GridViewRow row in GridView1.Rows) 
    { 



     TextBox dtm = row.FindControl("DtmTextBox") as TextBox; 


     string connStr = ConfigurationManager.ConnectionStrings["bbsConnectionString"].ConnectionString; 
     using (SqlConnection Con = new SqlConnection(connStr)) 
     { 
      Con.Open(); 
      SqlCommand cmd = new SqlCommand("Update tblAvailable set intqty=@intQty, curprice=@curprice where intresortid=@intresortid and dtm=@dtm and strroomtype=@strroomtype", Con); 



      // cmd.Parameters.AddWithValue("@dtm", DateTime.ParseExact(dtm.Text.Trim(), "dd/M/yyyy", System.Globalization.CultureInfo.InvariantCulture)); 

      cmd.ExecuteNonQuery(); 
      GridView1.EditIndex = -1; 
      GridView1.DataBind(); 
      GridView1.Visible = true; 




     } 

DisplyGridview(); 

}