Server.Transfer 在两个窗体之间传递参数用法

<asp:GridView ID="myGridView" runat="server" AutoGenerateColumns="False" Width="98%"
DataKeyNames="SalesOrderID" OnRowDataBound="myGridView_RowDataBound">
<Columns>
<asp:TemplateField>
<HeaderTemplate>
<input onclick="checkFormAll(this.checked)" type="checkbox">
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server"></asp:CheckBox>
</ItemTemplate>
<ItemStyle Width="20px" />
</asp:TemplateField>
<asp:BoundField DataField="SalesOrderID" HeaderText="ID" ReadOnly="True">
<ItemStyle Width="50px" />
</asp:BoundField>
<asp:TemplateField HeaderText="订单详情">
<ItemTemplate>
<a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="OpenModalDialog('SalesOrderShow.aspx?SalesOrderID=<%# Eval("SalesOrderID") %>');">
查看</a>
</ItemTemplate>
<ItemStyle Width="60px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="用料单明细">
<ItemTemplate>
<a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="OpenModalDialog('NeedMaterialDetailShow.aspx?SalesOrderID=<%# Eval("SalesOrderID") %>');">
查看</a>
</ItemTemplate>
<ItemStyle Width="70px" />
</asp:TemplateField>

</Columns>
</asp:GridView>

< br>
<asp:Button ID="btnCreatPurchaseOrderHeader" runat="server" Font-Size="16px" Height="30px"
OnClick="btnCreatPurchaseOrderHeader_Click" Text="根据已选订单生成订货单" Width="200px" />

//定义一个公共变量 保存选中的订单列表 供生成订货单页面使用
public string strArrSalesOrderID = string.Empty;

/// <summary>
/// Handles the Click event of the btnCreatPurchaseOrderHeader control.根据所选的订单生成订货单
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
protected void btnCreatPurchaseOrderHeader_Click(object sender, EventArgs e)
{
//遍历所有的 chkSelect
foreach (GridViewRow gr in this.myGridView.Rows)
{
CheckBox chk = (CheckBox)gr.FindControl("chkSelect");
if (chk.Checked)
{
strArrSalesOrderID = strArrSalesOrderID + this.myGridView.DataKeys[gr.RowIndex].Values["SalesOrderID"].ToString() + ",";
}
}
if (strArrSalesOrderID != string.Empty)
{
//去掉后面的逗号
strArrSalesOrderID = strArrSalesOrderID.Substring(0, strArrSalesOrderID.Length - 1);
Server.Transfer("PurchaseOrderHeaderEditFromSalesOrder.aspx");
}
else
{
UART.Common.MsgBox.Alert("请选择订单！", Request.Url.ToString());
}
}

//设置一个订货单ID字符串，保存生成的订货单ID
private string strArrPurchaseOrderHeaderID = string.Empty;

/// <summary>
/// Handles the Load event of the Page control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
protected void Page_Load(object sender, EventArgs e)
{
//UART.Common.CheckRoleAndPermission.CheckLogin();
//UART.Common.CheckRoleAndPermission.Check(0, 10);
if (!this.IsPostBack)
{
//实例上一个窗体SalesOrderListForPurchaseOrderHeader.aspx
SalesOrderListForPurchaseOrderHeader newWeb = (SalesOrderListForPurchaseOrderHeader)Context.Handler; ;
this.lblstrArrSalesOrderID.Text = newWeb.strArrSalesOrderID;
//绑定订单列表
this.BindSalesOrder();

}
}