Question

我需要在我的GridView中添加搜索。我有一个可折叠的gridview。因此，为了搜索目的，有没有办法在折叠的gridview中搜索某些内容并返回折叠的结果，然后展开项目以查看搜索的内容。

我制作了一个包含数千条记录的折叠教科书gridview。设置了分页，我有大约55页折叠形式的记录。

所以，如果有搜索书名和＃34;大学会计＆＃34;它将显示折叠的表单，然后查看搜索的内容，用户可以只展开返回的每个项目＆＃34;大学会计＆＃34;。

这可能吗？

Answer 1

这是一个让你入门的小代码。但我不知道循环所有网格列和单元格是否是搜索数据的有效方式...

在此示例中，代码将停止在网格中第一个找到的searchterm上查找更多结果。如果你想要最后一个，你应该从循环中删除if (searchTermFound == false)。如果要匹配多个结果，则应将找到的列和单元格存储在List或Array中。使用找到的rowIndexParent和rowIndexChild值，您可以在所需的行上展开网格。

    private void searchGridView(string searchTerm)
    {
        int rowIndexParent = -1;
        int cellIndexParent = -1;
        int rowIndexChild = -1;
        int cellIndexChild = -1;
        bool searchTermFound = false;

        //loop all rows in parent grid
        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            //remove this if you want the last match displayed as found, not the first
            if (searchTermFound == false)
            {
                //loop all cells in parent grid
                for (int j = 0; j < GridView1.Columns.Count; j++)
                {
                    string cellContent = GridView1.Rows[i].Cells[j].Text;
                    if (cellContent.ToLower().Contains(searchTerm.ToLower()))
                    {
                        rowIndexParent = i;
                        cellIndexParent = j;
                        searchTermFound = true;
                        break;
                    }
                }

                //find the nested grid and cast it
                GridView gv = GridView1.Rows[i].FindControl("GridView2") as GridView;

                //loop all rows in child grid
                for (int ii = 0; ii < gv.Rows.Count; ii++)
                {
                    //loop all cells in child grid
                    for (int jj = 0; jj < gv.Columns.Count; jj++)
                    {
                        string cellContent = gv.Rows[ii].Cells[jj].Text;

                        if (cellContent.ToLower().Contains(searchTerm.ToLower()))
                        {
                            rowIndexParent = i;

                            rowIndexChild = ii;
                            cellIndexChild = jj;
                            searchTermFound = true;
                            break;
                        }
                    }
                }
            }
        }

        //cellIndexParent > -1 means searchTerm is found in parent grid, not child
        if (searchTermFound == true && cellIndexParent > -1)
        {
            Response.Write("Searchterm \"" + searchTerm + "\" found in parent grid: row " + rowIndexParent + ", column " + cellIndexParent + ".");
        }
        else if (searchTermFound == true)
        {
            Response.Write("Searchterm \"" + searchTerm + "\" found in child grid: row " + rowIndexChild + ", column " + cellIndexChild + ", parent row " + rowIndexParent + ".");
        }
        else
        {
            Response.Write("Searchterm \"" + searchTerm + "\" not found.");
        }
    }

请注意，这仅适用于BoundField列，而不适用于TemplateField和AutoGenerated Columns。见下文。

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" OnRowDataBound="GridView1_RowDataBound">
        <Columns>
            <!-- search terms in these columns can be found -->
            <asp:BoundField DataField="field01" HeaderText="Column A" />
            <asp:BoundField DataField="field02" HeaderText="Column B" />

            <asp:TemplateField>
                <ItemTemplate>
                    <!-- search terms in this column cannot be found -->
                    <%# DataBinder.Eval(Container.DataItem, "field05").ToString() %>
                </ItemTemplate>
            </asp:TemplateField>

            <asp:TemplateField>
                <ItemTemplate>
                    <asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="false">
                        <Columns>
                            <!-- search terms in these columns can be found -->
                            <asp:BoundField DataField="field03" HeaderText="Column C" />
                            <asp:BoundField DataField="field04" HeaderText="Column D" />
                        </Columns>
                    </asp:GridView>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

搜索嵌套的Gridview ASP.net

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