asp.net - 在gridview，asp.net的不同页面中保存值

Question

我有一个包含 30 多个值的网格。网格视图页面大小为 10。当我在第一页中选择两个数据并转到下一页并选择另外两个数据并输入确定按钮时，网格视图还包含复选框，仅保存最后一次选择值。我想保存我在不同页面中选择的所有数据

谢谢提前

Answer 1

你可以试试这段代码：*

protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
BindGridData();
}
}
//This method is used to bind the gridview
protected void BindGridData()
{
SqlConnection con = new SqlConnection("Data Source=XXX;Integrated Security=true;Initial Catalog=MySampleDB");
SqlCommand cmd = new SqlCommand("select * from UserInformation", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
gvdetails.DataSource = ds;
gvdetails.DataBind();
}
protected void gvdetails_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
SaveCheckedValues();
gvdetails.PageIndex = e.NewPageIndex;
BindGridData();
PopulateCheckedValues();
}
//This method is used to populate the saved checkbox values
private void PopulateCheckedValues()
{
ArrayList userdetails = (ArrayList)Session["CHECKED_ITEMS"];
if (userdetails != null && userdetails.Count > 0)
{
foreach (GridViewRow gvrow in gvdetails.Rows)
{
int index = (int)gvdetails.DataKeys[gvrow.RowIndex].Value;
if (userdetails.Contains(index))
{
CheckBox myCheckBox = (CheckBox)gvrow.FindControl("chkSelect");
myCheckBox.Checked = true;
}
}
}
}
//This method is used to save the checkedstate of values
private void SaveCheckedValues()
{
ArrayList userdetails = new ArrayList();
int index = -1;
foreach (GridViewRow gvrow in gvdetails.Rows)
{
index = (int)gvdetails.DataKeys[gvrow.RowIndex].Value;
bool result = ((CheckBox)gvrow.FindControl("chkSelect")).Checked;
// Check in the Session
if (Session["CHECKED_ITEMS"] != null)
userdetails = (ArrayList)Session["CHECKED_ITEMS"];
if (result)
{
if (!userdetails.Contains(index))
userdetails.Add(index);
}
else
userdetails.Remove(index);
}
if (userdetails != null && userdetails.Count > 0)
Session["CHECKED_ITEMS"] = userdetails;
}

*