.Net GridView 应用：Gridview有一个CheckBox列，在用了分页的情况下，如何取出用户选择的所有记录id

思路一：每次换页时查询数据库，Session 保存已选

首先，分页保持每页先前选择的checkbox 的状态。

写了一个方法，遍历gridview,把选中的checkbox 的值存为arraylist 再保存 Session。在pageIndexChanging 事件里里调用。 （用；号分割，累加起来，样就遇到了一个问题，如果点了下一页，再回到上一页的话，Session 的值会有重复 ）。

protected void gvFileList_PageIndexChanging(object sender, GridViewPageEventArgs e)

{

RememberOldValues();

gvFileList.PageIndex = e.NewPageIndex;

bindData();

RePopulateValues();

}

/*保存分页前选择的值*/

private void RememberOldValues()

{

ArrayList categoryIDList = new ArrayList();

int index = -1;

foreach (GridViewRow row in gvFileList.Rows)

{

bool result = ((CheckBox)row.FindControl("chkfile")).Checked;

string str = returnStrRules(row);

// Check in the Session

if (Session["CHECKED_ITEMS"] != null)

categoryIDList = (ArrayList)Session["CHECKED_ITEMS"];

if (result)

{

if (!categoryIDList.Contains(str))

categoryIDList.Add(str);

}

else

categoryIDList.Remove(str);

}

if (categoryIDList != null && categoryIDList.Count > 0)

Session["CHECKED_ITEMS"] = categoryIDList;

}

/* 取出分页前选择的值 初始选中状态 */

private void RePopulateValues()

{

ArrayList categoryIDList = (ArrayList)Session["CHECKED_ITEMS"];

if (categoryIDList != null && categoryIDList.Count > 0)

{

foreach (GridViewRow row in gvFileList.Rows)

{

string str = returnStrRules(row);

if (categoryIDList.Contains(str))

{

CheckBox myCheckBox = (CheckBox)row.FindControl("chkfile");

myCheckBox.Checked = true;

}

}

}

}

// 保存到 arraylist 的stri 的规则

private string returnStrRules(GridViewRow row)

{

string result = null;

result = gvFileList.DataKeys[row.RowIndex].Value.ToString ();

//string folio = row.Cells[2].Text.ToString();

//string processType = row.Cells[6].Text.ToString(); /* albert提醒在修改Sql查询语句后要记得修改processType的Cells属性索引*/

//bool result = ((CheckBox)row.FindControl("chkfile")).Checked;

//folio = index + ";" + folio + ";" + processType;

return result;

}

解析字符串

public string setReturnStr()

{

ArrayList categoryIDList = (ArrayList)Session["CHECKED_ITEMS"];

if (categoryIDList != null && categoryIDList.Count > 0)

{

string str = null;

foreach (object index in categoryIDList)

{

str += index.ToString() + ",";

}

str=str.Substring(0, str.Length - 1);

this.txtReturn.Value = str;

}

//Session["CHECKED_ITEMS"] = null;

return true.ToString();

}

js实现当前页全选（gridview->table）

function selectAll(obj)

{

var theTable = obj.parentElement.parentElement.parentElement;

var i;

var j = obj.parentElement.cellIndex;

for(i=0;i<theTable.rows.length;i++)

{

var objCheckBox = theTable.rows[i].cells[j].firstChild;

if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;

}

}

<asp:GridView ID="gvFileList" runat="server" DataKeyNames="ID" AutoGenerateColumns="False"

Width="98%" AllowPaging="True" CssClass="tbl_border" OnPageIndexChanging="gvFileList_PageIndexChanging" PageSize="4">

<Columns>

<asp:TemplateField>

<ItemTemplate>

<asp:CheckBox runat="server" ID="chkfile" />

</ItemTemplate>

<%-- <HeaderTemplate>

<input id="CheckAll" type="checkbox" onclick="selectAll(this);" />本页全选

</HeaderTemplate>--%>

</asp:TemplateField>

<asp:BoundField DataField="id" HeaderText="序号">

<ItemStyle Font-Size="Smaller" Width="10%" />

<HeaderStyle Font-Size="Smaller" />

</asp:BoundField>

</Columns>

<FooterStyle Height="2px" Width="2px" />

<PagerStyle Height="1px" Font-Size="Smaller" />

<SelectedRowStyle BorderColor="#0066CC" />

<HeaderStyle HorizontalAlign="Left" Width="2px" Height="2px" CssClass="tbl_borderTH" />

<AlternatingRowStyle CssClass="tbl_borderStripe" />

</asp:GridView>