Question

我有以下数据库设计：

Employee Table: Username, Name, JobTitle, BadgeNo, IsActive, DivisionCode
Divisions Table: SapCode, DivisionShortcut

（DivisionCode是Divisions Table中SapCode的外键）

我有一个GridView，我用它来添加，删除和更新/编辑员工信息。此信息是员工用户名，名称，BadgeNo，JobTitle，IsActive和DivisionShortcut。分部将列在DropDownList中。现在的问题是：更新员工的分工。我写了代码，但我收到以下错误： *

无效的列名称'DivisionShortcut'。

ASP.NET代码：

    <asp:TemplateField HeaderText="Division">
        <ItemTemplate>
            <%# Eval("DivisionShortcut")%>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:DropDownList ID="DivisionsList" runat="server" DataSourceID="DivisionsListDataSource"
                                DataTextField="DivisionShortcut" DataValueField="SapCode">
            </asp:DropDownList>
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:BoundField DataField="Username" HeaderText="Network ID" ReadOnly="True" 
        SortExpression="Username" />

    <asp:TemplateField HeaderText="Name">
        <ItemTemplate>
            <%# Eval("Name")%>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox ID="txtEmployeeName" runat="server" Text='<%# Bind("Name")%>' />
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField HeaderText="Job Title">
        <ItemTemplate>
            <%# Eval("JobTitle")%>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox ID="txtJobTitle" runat="server" Text='<%# Bind("JobTitle")%>' />
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField HeaderText="Badge No.">
        <ItemTemplate>
            <%# Eval("BadgeNo")%>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox ID="txtBadgeNo" runat="server" Text='<%# Bind("BadgeNo")%>' />
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField HeaderText="Is Active?">
        <ItemTemplate>
            <%# Eval("IsActive")%>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:CheckBox ID="isActive" runat="server" 
                          Checked='<%# Eval("IsActive").ToString().Equals("True") %>'/>
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField HeaderText="Delete?">
        <ItemTemplate>
            <span onclick="return confirm('Are you sure to Delete the record?')">
                <asp:ImageButton ID="lnkB" runat="server" ImageUrl="Images/icons/delete24.png" CommandName="Delete" />
            </span>
        </ItemTemplate>
    </asp:TemplateField>
</Columns>

“

SelectCommand="SELECT     dbo.Divisions.DivisionShortcut, dbo.employee.Username, dbo.employee.Name, dbo.employee.JobTitle, dbo.employee.BadgeNo, dbo.employee.IsActive
                FROM         dbo.Divisions INNER JOIN
                            dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode"
UpdateCommand="UPDATE [employee] SET [Name] = @Name, [JobTitle] = @JobTitle, 
                                    [BadgeNo] = @BadgeNo WHERE [Username] = @Username"
DeleteCommand="DELETE FROM [employee] WHERE [Username] = @Username">
<UpdateParameters>
    <asp:Parameter Name="Name" Type="String"  />
    <asp:Parameter Name="JobTitle" Type="String" />
    <asp:Parameter Name="BadgeNo" Type="String" />
    <asp:Parameter Name="Username" Type="String" />
</UpdateParameters>
<DeleteParameters>
    <asp:Parameter Name="Username" Type="String" />
</DeleteParameters>

” SelectCommand =“SELECT * FROM Divisions”＆gt;

代码隐藏： //用于编辑GridView中的任何行 protected void GridView1_RowEditing（object sender，GridViewEditEventArgs e） { GridView1.EditIndex = e.NewEditIndex; }

//For canceling any editng in any row in the GridView
protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
    e.Cancel = true;
    GridView1.EditIndex = -1;
}

//For updating the information in any row in the GridView
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    GridViewRow gvrow = GridView1.Rows[e.RowIndex];

    DropDownList DivisionsList = (DropDownList)gvrow.FindControl("DivisionsList"); 

    TextBox txtEmployeeName = (TextBox)gvrow.FindControl("txtEmployeeName");
    TextBox txtJobTitle = (TextBox)gvrow.FindControl("txtJobTitle");
    TextBox txtBadgeNo = (TextBox)gvrow.FindControl("txtBadgeNo");

    CheckBox isActive = (CheckBox)gvrow.FindControl("isActive");

    //For getting the ID (primary key) of that row
    string username = GridView1.DataKeys[e.RowIndex].Value.ToString();

    string name = txtEmployeeName.Text;
    string jobTitle = txtJobTitle.Text;
    string badgeNo = txtBadgeNo.Text;
    string division = DivisionsList.SelectedValue.ToString();

    UpdateEmployeeInfo(username, name, jobTitle, badgeNo, division);
}


private void UpdateEmployeeInfo(string username, string name, string jobTitle, string badgeNo, string division)
{
    string connString = ConfigurationManager.ConnectionStrings["UsersInfoDBConnectionString"].ConnectionString;
    SqlConnection conn = new SqlConnection(connString);
    string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle, 
                        BadgeNo = @BadgeNo, DivisionShortcut = @division WHERE Username = @Username; 
                        UPDATE Divisions SET [DivisionShortcut] = @division WHERE SapCode = @SapCode;";

    SqlCommand cmd = new SqlCommand(update, conn);

    cmd.Parameters.AddWithValue("@Name", name);
    cmd.Parameters.AddWithValue("@JobTitle", jobTitle);
    cmd.Parameters.AddWithValue("@BadgeNo", badgeNo);
    cmd.Parameters.AddWithValue("@division", division);
    cmd.Parameters.AddWithValue("@Username", username);
    //cmd.Parameters.AddWithValue("@IsActive", isActive.checked);

    try
    {
        conn.Open();
        cmd.ExecuteNonQuery();
        conn.Close();

        GridView1.EditIndex = -1;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        cmd.Dispose();
        conn.Close();
        conn.Dispose();
    }
    GridView1.DataBind();
}

那么我如何能够使用GridView内的DropDownList更新员工的Divivsion字段？

更新

这是我的更新代码，但仍然没有与我合作： ASP.NET代码：

<asp:GridView ID="GridView1" runat="server" AllowSorting="True" 
            AutoGenerateColumns="False" DataKeyNames="Username" 
            DataSourceID="SqlDataSource1" BorderWidth="1px" BackColor="#DEBA84" 
             CellPadding="3" CellSpacing="2" BorderStyle="None" 
             BorderColor="#DEBA84">
            <FooterStyle ForeColor="#8C4510" 
              BackColor="#F7DFB5"></FooterStyle>
            <PagerStyle ForeColor="#8C4510" 
              HorizontalAlign="Center"></PagerStyle>
            <HeaderStyle ForeColor="White" Font-Bold="True" 
              BackColor="#A55129"></HeaderStyle>
            <Columns>
                <asp:CommandField ButtonType="Image" ShowEditButton="true" ShowCancelButton="true"
                                EditImageUrl="Images/icons/edit24.png" UpdateImageUrl="Images/icons/update24.png" 
                                CancelImageUrl="Images/icons/cancel324.png" />

                <asp:TemplateField HeaderText="Division">
                    <ItemTemplate>
                        <%# Eval("DivisionShortcut")%>
                        <asp:HiddenField ID="divisioncode" value='<%#Eval("divisioncode")%>' runat="server" />
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:DropDownList ID="DivisionsList" runat="server" DataSourceID="DivisionsListDataSource"
                                          DataTextField="DivisionShortcut" DataValueField="SapCode">
                        </asp:DropDownList>
                    </EditItemTemplate>
                </asp:TemplateField>

                <asp:BoundField DataField="Username" HeaderText="Network ID" ReadOnly="True" 
                    SortExpression="Username" />

                <asp:TemplateField HeaderText="Name">
                    <ItemTemplate>
                        <%# Eval("Name")%>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtEmployeeName" runat="server" Text='<%# Bind("Name")%>' />
                    </EditItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Job Title">
                    <ItemTemplate>
                        <%# Eval("JobTitle")%>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtJobTitle" runat="server" Text='<%# Bind("JobTitle")%>' />
                    </EditItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Badge No.">
                    <ItemTemplate>
                        <%# Eval("BadgeNo")%>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtBadgeNo" runat="server" Text='<%# Bind("BadgeNo")%>' />
                    </EditItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Is Active?">
                    <ItemTemplate>
                        <%# Eval("IsActive")%>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:CheckBox ID="isActive" runat="server" 
                                      Checked='<%# Eval("IsActive").ToString().Equals("True") %>'/>
                    </EditItemTemplate>
                </asp:TemplateField>

                <asp:TemplateField HeaderText="Delete?">
                    <ItemTemplate>
                        <span onclick="return confirm('Are you sure to Delete the record?')">
                            <asp:ImageButton ID="lnkB" runat="server" ImageUrl="Images/icons/delete24.png" CommandName="Delete" />
                        </span>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:UsersInfoDBConnectionString %>" 

            SelectCommand="SELECT     dbo.Divisions.DivisionShortcut,dbo.employee.DivisionCode, dbo.employee.Username, dbo.employee.Name, dbo.employee.JobTitle, dbo.employee.BadgeNo, dbo.employee.IsActive
                    FROM         dbo.Divisions INNER JOIN
                                dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode"
            UpdateCommand="UPDATE [employee] SET [Name] = @Name, [JobTitle] = @JobTitle, 
                                                [BadgeNo] = @BadgeNo WHERE [Username] = @Username"
            DeleteCommand="DELETE FROM [employee] WHERE [Username] = @Username">
            <UpdateParameters>
                <asp:Parameter Name="Name" Type="String"  />
                <asp:Parameter Name="JobTitle" Type="String" />
                <asp:Parameter Name="BadgeNo" Type="String" />
                <asp:Parameter Name="Username" Type="String" />
            </UpdateParameters>
            <DeleteParameters>
                <asp:Parameter Name="Username" Type="String" />
            </DeleteParameters>
        </asp:SqlDataSource>

        <asp:SqlDataSource ID="DivisionsListDataSource" runat="server" 
            ConnectionString="<%$ ConnectionStrings:UsersInfoDBConnectionString %>" 
            SelectCommand="SELECT * FROM Divisions">
        </asp:SqlDataSource>

代码隐藏：

//For editing any row in the GridView
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
    {
        GridView1.EditIndex = e.NewEditIndex;
    }

    //For canceling any editng in any row in the GridView
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        e.Cancel = true;
        GridView1.EditIndex = -1;
    }

    //For updating the information in any row in the GridView
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        GridViewRow gvrow = GridView1.Rows[e.RowIndex];

        DropDownList DivisionsList = (DropDownList)gvrow.FindControl("DivisionsList");
        HiddenField hidden = (HiddenField)gvrow.FindControl("divisioncode");
        string division_code = hidden.Value.ToString();

        TextBox txtEmployeeName = (TextBox)gvrow.FindControl("txtEmployeeName");
        TextBox txtJobTitle = (TextBox)gvrow.FindControl("txtJobTitle");
        TextBox txtBadgeNo = (TextBox)gvrow.FindControl("txtBadgeNo");

        CheckBox isActive = (CheckBox)gvrow.FindControl("isActive");

        //For getting the ID (primary key) of that row
        string username = GridView1.DataKeys[e.RowIndex].Value.ToString();

        string name = txtEmployeeName.Text;
        string jobTitle = txtJobTitle.Text;
        string badgeNo = txtBadgeNo.Text;
        string division = DivisionsList.SelectedValue.ToString();

        //string divisioncode = DivisionsList.SelectedValue;

        UpdateEmployeeInfo(username, name, jobTitle, badgeNo, division, division_code);
    }


    private void UpdateEmployeeInfo(string username, string name, string jobTitle, string badgeNo, string division, string divisioncode)
    {
        string connString = ConfigurationManager.ConnectionStrings["UsersInfoDBConnectionString"].ConnectionString;
        SqlConnection conn = new SqlConnection(connString);
        string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle, 
                            BadgeNo = @BadgeNo WHERE Username = @Username; 
                            UPDATE Divisions SET [DivisionShortcut] = @division WHERE SapCode = @SapCode;";

        SqlCommand cmd = new SqlCommand(update, conn);

        cmd.Parameters.AddWithValue("@Name", name);
        cmd.Parameters.AddWithValue("@JobTitle", jobTitle);
        cmd.Parameters.AddWithValue("@BadgeNo", badgeNo);
        cmd.Parameters.AddWithValue("@division", division);
        cmd.Parameters.AddWithValue("@Username", username);
        cmd.Parameters.AddWithValue("@SapCode", divisioncode);
        //cmd.Parameters.AddWithValue("@IsActive", isActive.checked);

        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            conn.Close();

            GridView1.EditIndex = -1;
        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }
        GridView1.DataBind();
    }

Answer 1

以下行代码部分出错：

string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle, 
                        BadgeNo = @BadgeNo, DivisionShortcut = @division WHERE Username = @Username;
                                                     ^^
                        UPDATE Divisions SET [DivisionShortcut] = @division WHERE SapCode = @SapCode;";

dividionshortcut不是员工表的成员。只需将其从标记位置移除并再次运行它我确定这将删除您的错误。

要使用的代码。在gridview中添加以下字段：

 <asp:TemplateField HeaderText="Division">
            <ItemTemplate>
                <%# Eval("DivisionShortcut")%>
<asp:HiddenField ID="divisioncode" value='<%#Eval("divisioncode")%>' runat="server" />
            </ItemTemplate>
            <EditItemTemplate>
                <asp:DropDownList ID="DivisionsList" runat="server" DataSourceID="DivisionsListDataSource"
                                    DataTextField="DivisionShortcut" DataValueField="SapCode">
                </asp:DropDownList>
            </EditItemTemplate>
        </asp:TemplateField>

首先使用以下select命令

 SelectCommand="SELECT     dbo.Divisions.DivisionShortcut,dbo.employee.DivisionCode, dbo.employee.Username, dbo.employee.Name, dbo.employee.JobTitle, dbo.employee.BadgeNo, dbo.employee.IsActive
                    FROM         dbo.Divisions INNER JOIN
                                dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode"
    UpdateCommand="UPDATE [employee] SET [Name] = @Name, [JobTitle] = @JobTitle, 
                                        [BadgeNo] = @BadgeNo WHERE [Username] = @Username"
    DeleteCommand="DELETE FROM [employee] WHERE [Username] = @Username">
    <UpdateParameters>
        <asp:Parameter Name="Name" Type="String"  />
        <asp:Parameter Name="JobTitle" Type="String" />
        <asp:Parameter Name="BadgeNo" Type="String" />
        <asp:Parameter Name="Username" Type="String" />
    </UpdateParameters>
    <DeleteParameters>
        <asp:Parameter Name="Username" Type="String" />
    </DeleteParameters>

当调用行更新事件时，请使用以下命令：

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    GridViewRow gvrow = GridView1.Rows[e.RowIndex];

    DropDownList DivisionsList = (DropDownList)gvrow.FindControl("DivisionsList"); 
    HiddenField hidden = (HiddenField)gvrow.FindControl("divisioncode");
    string division_code=hidden.value.ToString();
    TextBox txtEmployeeName = (TextBox)gvrow.FindControl("txtEmployeeName");
    TextBox txtJobTitle = (TextBox)gvrow.FindControl("txtJobTitle");
    TextBox txtBadgeNo = (TextBox)gvrow.FindControl("txtBadgeNo");

    CheckBox isActive = (CheckBox)gvrow.FindControl("isActive");

    //For getting the ID (primary key) of that row
    string username = GridView1.DataKeys[e.RowIndex].Value.ToString();

    string name = txtEmployeeName.Text;
    string jobTitle = txtJobTitle.Text;
    string badgeNo = txtBadgeNo.Text;
    string division = DivisionsList.SelectedValue.ToString();

    UpdateEmployeeInfo(username, name, jobTitle, badgeNo, division,division_code);
}

现在在代码后面为函数中的除法代码添加一个参数，并调用以下更新函数：

 private void UpdateEmployeeInfo(string username, string name, string jobTitle, string badgeNo, string division,string divisioncode)
    {
        string connString = ConfigurationManager.ConnectionStrings["UsersInfoDBConnectionString"].ConnectionString;
        SqlConnection conn = new SqlConnection(connString);
        string update = @"UPDATE Employee SET Name = @Name, JobTitle = @JobTitle, 
                            BadgeNo = @BadgeNo WHERE Username = @Username; 
                            UPDATE Divisions SET [DivisionShortcut] = @division WHERE SapCode = @SapCode;";

        SqlCommand cmd = new SqlCommand(update, conn);

        cmd.Parameters.AddWithValue("@Name", name);
        cmd.Parameters.AddWithValue("@JobTitle", jobTitle);
        cmd.Parameters.AddWithValue("@BadgeNo", badgeNo);
        cmd.Parameters.AddWithValue("@division", division);
        cmd.Parameters.AddWithValue("@Username", username);
        cmd.Parameters.AddWithValue("@DapCode", divisioncode);

        try
        {
            conn.Open();
            cmd.ExecuteNonQuery();
            conn.Close();

            GridView1.EditIndex = -1;
        }
        catch (Exception ex)
        {
            throw ex;
        }
        finally
        {
            cmd.Dispose();
            conn.Close();
            conn.Dispose();
        }
        GridView1.DataBind();
    }

我希望这能解决你的问题

Answer 2

这是你的代码

UPDATE Employee SET Name = @Name, JobTitle = @JobTitle, 
                    BadgeNo = @BadgeNo, DivisionShortcut = @division WHERE Username =     @Username;

DivisionShortcut不是Employee表的成员。你有一个更新声明，所以我认为你只是意外地把它留在那里，从这个更新行删除它将解决问题。

为什么使用GridView中的DropDownList无法更新此列？

2 个答案: