Question

我是一名新的ASP.NET开发人员，我正在为我的公司开发一个基于Web的建议框程序，员工可以在其中提交任何安全建议。现在，我正在研究该系统的管理部分。

管理员将能够看到GridView控件中列出的所有建议。在GridView的最后一列中，状态将列在那里。当管理员点击其中一个建议的状态时，将出现一个新的弹出窗口（asp.net ajax ModalPopUpExtender），列出所有可能的状态，例如：actioned，approved ...等。当Admin选择其中一个状态，建议的状态将在数据库中更新。 我编写了代码，但仍未更新建议的状态，

你能帮我修改吗？

仅供参考，我有以下数据库设计：

Employee Table: Username, Name...
SafetySuggestionsLog: ID, Title, Description, Username, StatusID
SafetySuggestionsStatus: ID, Status

ASP.NET代码：

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
        <asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
                        AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="ID" 
                        width="900px" CssClass="mGrid" 
                        DataSourceID="SqlDataSource1" 
                        OnRowDataBound="GridView1_RowDataBound">
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" CssClass="alt" />
            <HeaderStyle Font-Bold = "True" ForeColor="Black" Height="20px"/> 
            <Columns>
                <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" 
                    ReadOnly="True" SortExpression="ID" />
                <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
                <asp:BoundField DataField="Description" HeaderText="Description" 
                    SortExpression="Description" />
                <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
                <asp:BoundField DataField="Username" HeaderText="Username" 
                    SortExpression="Username" />
                <asp:BoundField DataField="DivisionShortcut" HeaderText="DivisionShortcut" 
                    SortExpression="DivisionShortcut" />
                <asp:BoundField DataField="Type" HeaderText="Type" SortExpression="Type" />

                <%-- This to make status be opened and edited through the Ajax ModalPopUp Window --%>
                <asp:TemplateField HeaderText="Status">
                    <ItemTemplate>
                        <asp:LinkButton runat="server" ID="lnkSuggestionStatus" Text='<%#Eval("Status")%>'
                                        OnClick="lnkSuggestionStatus_Click">
                        </asp:LinkButton>
                    </ItemTemplate>
                </asp:TemplateField>

                <%--<asp:HyperLinkField HeaderText="Status" 
                    SortExpression="Status" />--%>
            </Columns>
            <RowStyle HorizontalAlign="Center" />
        </asp:GridView>

        <asp:Button runat="server" ID="btnModalPopUp" style="display:none" />

        <AjaxToolkit:ModalPopUpExtender ID="modalPopUpExtender1"
                                        runat="server" 
                                        TargetControlID="btnModalPopUp" 
                                        PopupControlID="pnlPopUp" 
                                        BackgroundCssClass="popUpStyle"
                                        PopupDragHandleControlID="panelDragHandle" 
                                        OkControlID="OKButton">
        </AjaxToolkit:ModalPopUpExtender>

        <asp:Panel runat="server" ID="pnlPopUp">

                    <asp:RadioButtonList ID="StatusList" runat="server" RepeatColumns="1" RepeatDirection="Vertical"
                                            RepeatLayout="Table" TextAlign="Left" DataSourceID="SuggestionStatusDataSource"
                                            DataTextField="Status" DataValueField="ID">
                        <asp:ListItem id="option1" runat="server" Value="ACTIONED" />
                        <asp:ListItem id="option2" runat="server" Value="APPROVED" />
                        <asp:ListItem id="option3" runat="server" Value="PENDING" />
                        <asp:ListItem id="option4" runat="server" Value="TRANSFERRED" />
                    </asp:RadioButtonList>
                    <asp:SqlDataSource ID="SuggestionStatusDataSource" runat="server"
                                        ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
                                        SelectCommand="SELECT * FROM [SafetySuggestionsStatus]"></asp:SqlDataSource>

                    <asp:Button ID="confirmButton" runat="server" Text="Confirm" 
                                OnClientClick="javascript:return confirm('Are you sure you want to send an email notification about the safety suggestion to the owner?')" 
                                OnClick="btnSendStatus_Click" />

            <asp:Button ID="OKButton" runat="server" Text="Close" />
        </asp:Panel>
        </ContentTemplate>
        </asp:UpdatePanel>

代码隐藏：

protected void lnkSuggestionStatus_Click(object sender, EventArgs e)
    {
        LinkButton lnkSuggestionStatus = sender as LinkButton;

//var safetySuggestionsId=

        //get reference to the row selected 
        GridViewRow gvrow = (GridViewRow)lnkSuggestionStatus.NamingContainer;


        //set the selected index to the selected row so that the selected row will be highlighted
        GridView1.SelectedIndex = gvrow.RowIndex;

        //show the modalPopUp
        modalPopUpExtender1.Show();
    }

public void btnSendStatus_Click(object sender, EventArgs e) {
        var statusID = StatusList.SelectedValue;

        string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
        //For updating the status of the safety suggestion
        string updateCommand = "UPDATE SafetySuggestionsStatus SET ID= @statusID where ID=@SafetySuggestionsID"";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            //using (SqlCommand cmd = new SqlCommand(cmdText, conn))
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
            {

                cmd.Parameters.AddWithValue("@ID", statusID);
                cmd.ExecuteNonQuery();
            }
        }

        SendSuggestionStatusToUser(statusID);
    }

更新

当我调试代码时，出现以下错误：

SqlException was unhandled by user code 
 Must declare the scalar variable "@SafetySuggestionsID"

更新2：

我按照你的建议修改了我的代码：

protected void lnkSuggestionStatus_Click(object sender, EventArgs e)
    {
        LinkButton lnkSuggestionStatus = sender as LinkButton;

        //var safetySuggestionsId = 

        //get reference to the row selected 
        GridViewRow gvrow = (GridViewRow)lnkSuggestionStatus.NamingContainer;

        //set the selected index to the selected row so that the selected row will be highlighted
        GridView1.SelectedIndex = gvrow.RowIndex;

        HiddenField1.Value = gvrow.RowIndex.ToString();

        //show the modalPopUp
        modalPopUpExtender1.Show();
    }

    public void btnSendStatus_Click(object sender, EventArgs e) {

        var statusID = StatusList.SelectedValue;

        string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
        //For updating the status of the safety suggestion
        string updateCommand = "UPDATE SafetySuggestionsLog SET StatusID= @statusID where ID=@SafetySuggestionsID";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
            {
                cmd.Parameters.AddWithValue("@ID", Convert.ToInt32(statusID));
                cmd.Parameters.AddWithValue("@SafetySuggestionsID", Convert.ToInt32(HiddenField1.Value));
                cmd.ExecuteNonQuery();
            }
            //reset the value of hiddenfield
            HiddenField1.Value = "-1";
        }

        //SendSuggestionStatusToUser(statusID);
    }

但是，当我调试代码时，我收到以下错误：

必须声明标量变量“@statusID”

我不知道为什么我在定义它时会收到此错误。

更新3：

我添加了GridView1.DataBind()来更新GridView，其中包含所选建议的更新状态，但它不适用于我。

public void btnSendStatus_Click(object sender, EventArgs e) {

        var statusID = StatusList.SelectedValue;

        string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
        //For updating the status of the safety suggestion
        string updateCommand = "UPDATE SafetySuggestionsLog SET StatusID= @statusID where ID=@SafetySuggestionsID";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
            {
                cmd.Parameters.AddWithValue("@statusID", Convert.ToInt32(statusID));
                cmd.Parameters.AddWithValue("@SafetySuggestionsID", Convert.ToInt32(HiddenField1.Value));
                cmd.ExecuteNonQuery();
            }
            //reset the value of hiddenfield
            HiddenField1.Value = "-1";
        }

        GridView1.DataBind();

        //SendSuggestionStatusToUser(statusID);
    }

更新4： 我添加了以下内容但它不起作用：

public void btnSendStatus_Click(object sender, EventArgs e) {

        var statusID = StatusList.SelectedValue;

        string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
        //For updating the status of the safety suggestion
        string updateCommand = "UPDATE SafetySuggestionsLog SET StatusID= @statusID where ID=@SafetySuggestionsID";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
            {
                cmd.Parameters.AddWithValue("@statusID", Convert.ToInt32(statusID));
                cmd.Parameters.AddWithValue("@SafetySuggestionsID", Convert.ToInt32(HiddenField1.Value));
                cmd.ExecuteNonQuery();
            }
            //reset the value of hiddenfield
            HiddenField1.Value = "-1";
        }

        UpdatePanel1.Update();
        GridView1.DataBind();


        //SendSuggestionStatusToUser(statusID);
    }

Answer 1

我在任何地方都没有看到SafetySuggestionsID ...你已将其定义为statusID

当您添加参数时，您引用ID ...请进行这些更正或更新查询中的代码。

string updateCommand = "UPDATE SafetySuggestionsStatus SET ID= @statusID";  // where??
        using (SqlConnection conn = new SqlConnection(connString))  
        {  
            conn.Open();  
            //using (SqlCommand cmd = new SqlCommand(cmdText, conn))  
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))  
            {  

                cmd.Parameters.AddWithValue("@statusID", statusID);  
                cmd.ExecuteNonQuery();  
            }  
        }

<强>更新：

"UPDATE SafetySuggestionsStatus SET ID= @statusID where ID=@SafetySuggestionsID"";

您已经定义了2个参数，但在参数colleciton中只添加了1：

cmd.Parameters.AddWithValue("@ID", statusID); // id should be statusID
// also add @SafetySuggestionsID

更新2： 在lnkSuggestionStatus_Click事件处理程序中，获取第一列（ID）的值并将其存储在类变量中，例如safetySuggestionsId。

然后在btnSendStatus_Click事件处理程序中，您只需添加：

using (SqlConnection conn = new SqlConnection(connString))   
        {   
            conn.Open();   
            //using (SqlCommand cmd = new SqlCommand(cmdText, conn))   
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))   
            {   

                cmd.Parameters.AddWithValue("@statusID ", statusID); 
                cmd.Parameters.AddWithValue("@SafetySuggestionsID", safetySuggestionsId);   
                cmd.ExecuteNonQuery();   
            }   
        }

更新3： 希望以下工作，因为这是未经测试的......：

在模态弹出式面板中添加隐藏字段 - ＆gt;
然后在您的lnkSuggestionStatus_Click事件处理程序中添加：

hiddenRowIndex.Value = row.Cells [1] .Text; //必要时修剪

然后当您保存时，在btnSendStatus_Click事件处理程序中，您只需添加：

       ...
       ...   
        {   

            cmd.Parameters.AddWithValue("@statusID ", statusID); 
            cmd.Parameters.AddWithValue("@SafetySuggestionsID", 
                                        Convert.ToInt32(hiddenRowIndex.Value));   
            cmd.ExecuteNonQuery();   
        } 
        // reset hiddenRowIndex
        hiddenRowIndex.Value = "-1";
    }

Answer 2

看看这个示例项目

http://www.codeproject.com/Articles/17722/GridView-with-a-single-ModalPopupExtender-Panel-fo

http://mattberseth.com/blog/2007/07/modalpopupextender_example_for.html

http://thinkofdotnet.blogspot.com/2012/05/edit-update-gridview-with-ajax.html

Answer 3

最后，我知道如何解决它。我的问题在于HiddenField，我将其立即分配给所选行的索引，而没有指定将其分配给该行的DataKey。

我只需要在lnkSuggestionStatus_Click方法中修改它：

HiddenField1.Value = GridView1.DataKeys[gvrow.RowIndex].Value.ToString();

如何使用Ajax ModalPopUpExtender控件更新GridView中的特定列？

3 个答案: