Question

我通过GridView处理ObjectDataSource。我还根据dropdown list以及textbox来搜索一些过滤函数。我的代码如下所示：

.aspx：

   <asp:GridView ID="GridView1" runat="server"  AutoGenerateColumns="False"  AllowPaging="true"  PageSize="30" EmptyDataText="No data available" BackColor="White" BorderColor="#CCCCCC" BorderStyle="None" BorderWidth="1px" CellPadding="3" DataSourceID="ObjectDataSource1" >
        <Columns>
            <asp:BoundField DataField="Name" HeaderText="Name" ReadOnly="True" SortExpression="" >
            <HeaderStyle Width="45%" />
            <ItemStyle HorizontalAlign="Center" Height="100px" Width="40%" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" />
            </asp:BoundField>
            <asp:BoundField DataField="Department" HeaderText="Department" ReadOnly="True" SortExpression="" >
                <ItemStyle Width="40%" HorizontalAlign="Center" Height="100px" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" />
                </asp:BoundField>
         </Columns>

  </asp:GridView>

         <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" TypeName="Staff" SelectMethod="StaffData" />

过滤方法：

protected void Button1_Click(object sender, EventArgs e)
{

    if (DropDownList1.SelectedValue.ToString() == "Name")
    {

        ObjectDataSource1.FilterExpression = "Name LIKE '%" + TextBox1.Text + "%' ";

    }
    else if (DropDownList1.SelectedValue.ToString() == "Department")
    {

        ObjectDataSource1.FilterExpression = "Department LIKE '" + TextBox1.Text + "' ";

    }

如您所见，我在GridView中启用了Paging。现在我的问题是：当我选择过滤器并按部门搜索时，我得到了预期的结果。举个例子，我搜索了媒体部门，页面上显示了30个结果。底部的分页指示符表示有4页结果。如果我现在点击第二页，我会在没有应用过滤器的情况下进入GridView中所有结果的第二页。因此无论出于何种原因，过滤器都被移除希望我已经解释好了。任何人都知道如何解决这个问题？

修改我试图让PageIndexChanging像这样：

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    if (ViewState["test"] != null)
    {
        if ((bool)ViewState["test"] == true)
        {
            if (DropDownList1.SelectedValue.ToString() == "Name")
            {

                ObjectDataSource1.FilterExpression = "Name LIKE '%" + TextBox1.Text + "%' ";

            }
            else if (DropDownList1.SelectedValue.ToString() == "Department")
            {

                ObjectDataSource1.FilterExpression = "Department LIKE '" + TextBox1.Text + "' ";

            }

        }
    }

}
protected void Button1_Click(object sender, EventArgs e)
{
    ViewState.Add("test", true);

    if (DropDownList1.SelectedValue.ToString() == "Name")
    {

        ObjectDataSource1.FilterExpression = "Name LIKE '%" + TextBox1.Text + "%' ";

    }
 else if (DropDownList1.SelectedValue.ToString() == "Department")
            {

                ObjectDataSource1.FilterExpression = "Department LIKE '" + TextBox1.Text + "' ";

            }
  }

Answer 1

我实际上让它与上面的编辑一起工作。它不是最漂亮的解决方案，但它有效 - 只要发布这个答案，万一其他人遇到同样的问题。

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1 个答案: