C# 更新后要显示的Gridview
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。更新相关单元格,然后单击保存 问题是我的Gridview在更新后会消失。 我希望Gridview保持显示更新的数据。 我该怎么做 代码片段:C# 更新后要显示的Gridview,c#,asp.net,gridview,web-controls,C#,Asp.net,Gridview,Web Controls,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。更新相关单元格,然后单击保存 问题是我的Gridview在更新后会消失。 我希望Gridview保持显示更新的数据。 我该怎么做 代码片段: string connStr = ConfigurationManager.ConnectionStrings["bbsConnectionString"].ConnectionString; using (SqlConn
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;
}
在调用bind方法之前,必须将datatable/DataSet分配给数据源
GridView1.DataSource = dt;
GridView1.DataBind();
这里是在更新后绑定网格,但不将DataTable分配给GridView1.DataSource。您可以在这里调用DataGrid方法,而不是像这样进行绑定
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;
删除以前绑定网格的这些语句和调用方法我已经在下面的代码中使用过了。我会工作的。您应该再次调用按日期显示网格视图的方法
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;
}
}
}
受保护的无效GridView1_行更新(对象发送方,GridViewUpdateEventArgs e)
{
}除了button1\u中的datatable dt在button1\u中执行更新时单击,单击在网格中加载和填充数据的方法,如FillGrid()和update语句后调用,以及在任何需要填充网格的地方,是否有示例,请更新我的答案,我希望它能帮助您加载数据谢谢@Kuldeep:我将使用上面的答案,因为我没有使用行更新。
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();