GridVIew 在 page_load 上有一个 Databind，在单击按钮时有另一个。如果页面编号单击转到第一个数据绑定，则在第二个数据绑定上时

Question

我有一个带有分页功能的 GridView，并在 Page_Load 上以编程方式对其进行数据绑定。我还有一个搜索按钮，当单击它时，它会绑定到不同的 sql 命令。如果您单击搜索按钮并检索多个页面，并且如果您单击第 2 页，它将检索第一个 Databind() 的数据。如何使用 GridView1.PageIndexChanging 解决这个问题，这是我在第一个 Databind 上用于分页的方法？ Anyhelp将不胜感激。它甚至可能吗？

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
    AutoGenerateColumns="False" PageSize="100">
 <Columns>
    <asp:BoundField DataField="fldEmployeeID" HeaderText="EmployeeID" />
    <asp:BoundField DataField="fldAbsentDate" HeaderText="AbsentDate" />
    <asp:BoundField DataField="fldAbsentCode" HeaderText="AbsentCode" />
    <asp:BoundField DataField="fldRuleViolationWarningType" HeaderText="Rule Violation Warning" />
    <asp:BoundField DataField="fldRuleViolationIssueDate" HeaderText="Rule Violation Issue Date" />
    <asp:BoundField DataField="fldLOAEndDate" HeaderText="LOA End Date" />
</Columns>

</asp:GridView>

vb.net

   Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim SqlDataSource1 As SqlDataSource = New SqlDataSource()
    SqlDataSource1.ID = "SqlDataSource1"
    Page.Controls.Add(SqlDataSource1)
    SqlDataSource1.ConnectionString = "your connection string"
    'SqlDataSource1.SelectCommand = "SELECT * FROM [tblAbsences] WHERE [fldEmployeeID]=38"
    SqlDataSource1.SelectCommand = "SELECT * FROM [tblAbsences] ORDER BY [fldEmployeeID], [fldAbsentDate], [fldAbsentCode]"
    GridView1.DataSource = SqlDataSource1
    GridView1.DataBind()
End Sub

Protected Sub GridView1_PageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs) Handles GridView1.PageIndexChanging
    GridView1.PageIndex = e.NewPageIndex
    GridView1.DataBind()
End Sub

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

    Dim SqlDataSource2 As SqlDataSource = New SqlDataSource()
    SqlDataSource2.ID = "SqlDataSource2"
    Page.Controls.Add(SqlDataSource2)
    SqlDataSource2.ConnectionString = "your connection string"
    SqlDataSource2.SelectCommand = "SELECT * FROM [tblAbsences] WHERE [fldAbsentDate] BETWEEN '7-03-2014' AND '8-21-2014' ORDER BY [fldAbsentDate]"
    'SqlDataSource2.SelectCommand = "SELECT * FROM [tblAbsences] ORDER BY [fldEmployeeID], [fldAbsentDate], [fldAbsentCode]";
    GridView1.DataSource = SqlDataSource2
    GridView1.DataBind()

End Sub

Answer 1

在主表单中添加一个不可见的 html 标签/文本框...

<asp:label runat="Server" ID="SDS2" visible="false" text="0" />

页面加载如下所示，并且可能会受益于在同一 IF 语句的“else”子句中添加 SDS2。

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    If SDS2.Text = "0"
        Dim SqlDataSource1 As SqlDataSource = New SqlDataSource()
        SqlDataSource1.ID = "SqlDataSource1"
        Page.Controls.Add(SqlDataSource1)
        SqlDataSource1.ConnectionString = "your connection string"
        'SqlDataSource1.SelectCommand = "SELECT * FROM [tblAbsences] WHERE [fldEmployeeID]=38"
        SqlDataSource1.SelectCommand = "SELECT * FROM [tblAbsences] ORDER BY [fldEmployeeID],       [fldAbsentDate], [fldAbsentCode]"
        GridView1.DataSource = SqlDataSource1

        GridView1.DataBind()
    Else
        'Call the SDS2 stuff here
    End If
End Sub

并在您的按钮单击处理程序中添加此行以将其设置为使用 SDS2。

SDS2.Text = "1"