c# - 插入到 Gridview 中。在 refresh..asp.net 上插入

Question

我有一个客户 Gridview，可以在页脚模板中插入新客户。

当我按下插入按钮时，我会重定向到同一页面，我可以在 gridview 中看到我的新客户。

值得注意的是，当我直接在页面上进行刷新时，它会再次添加相同的客户。这对我来说真的很奇怪，因为在我重定向之后，我的必填字段（如名字姓氏等）当然都是空的，但页面仍然从之前获取值并进行另一个插入。

为什么会这样，我该如何解决这个问题？

aspx

<asp:GridView ID="GridView1" runat="server" AllowSorting="True" AutoGenerateColumns="False" CellPadding="3" DataKeyNames="CustID" DataSourceID="Event" GridLines="Horizontal" ShowFooter="True" AllowPaging="True" BackColor="White" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px" OnRowDataBound="GridView1_RowDataBound">
    <AlternatingRowStyle BackColor="#F7F7F7" HorizontalAlign="Center" />
    <Columns>
        <asp:CommandField ShowEditButton="True" />
        <asp:TemplateField HeaderText="ID" InsertVisible="False" SortExpression="CustID">
            <EditItemTemplate>
                <asp:Label ID="Label1" runat="server" Text='<%# Eval("CustID") %>'></asp:Label>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label1" runat="server" Text='<%# Bind("CustID") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <asp:LinkButton ValidationGroup="INSERT" OnClick="lbInsert_Click"  ID="lbInsert" runat="server" >Insert</asp:LinkButton>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Anrede" SortExpression="Gender">
            <EditItemTemplate>
                <asp:DropDownList ID="DropDownList3" runat="server" DataSourceID="SqlDataSource1" DataTextField="Gender" DataValueField="Gender" SelectedValue='<%# Bind("Gender") %>'>
                </asp:DropDownList>
                <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:EventConnectionString %>" SelectCommand="SELECT DISTINCT [Gender] FROM [Customer]"></asp:SqlDataSource>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label2" runat="server" Text='<%# Bind("Gender") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label13" runat="server" Text="Anrede"></asp:Label>
                <asp:DropDownList ID="ddlGender" runat="server">
                    <asp:ListItem>Anrede Auswählen</asp:ListItem>
                    <asp:ListItem>Herr</asp:ListItem>
                    <asp:ListItem>Frau</asp:ListItem>
                </asp:DropDownList>
                <asp:RequiredFieldValidator ID="rfvInsGender" runat="server" ErrorMessage="Anrede ist ein Pflichtfeld"
                    ControlToValidate="ddlGender" ValidationGroup="INSERT" Text="*" ForeColor="Red" InitialValue="Anrede Auswählen">
                </asp:RequiredFieldValidator>
                </div>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name" SortExpression="LastName">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("LastName") %>'></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEdLastName" runat="server" ErrorMessage="Name ist ein Pflichtfeld"
                    ControlToValidate="TextBox2" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label3" runat="server" Text='<%# Bind("LastName") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label14" runat="server" Text="Name"></asp:Label></div>
                <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvInsLastName" runat="server" ErrorMessage="Name ist ein Pflichtfeld"
                    ControlToValidate="txtLastName" ValidationGroup="INSERT" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Vorname" SortExpression="FirstName">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("FirstName") %>'></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEdFirstName" runat="server" ErrorMessage="VorName ist ein Pflichtfeld"
                    ControlToValidate="TextBox3" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label4" runat="server" Text='<%# Bind("FirstName") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label15" runat="server" Text="Vorname"></asp:Label></div>
                <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvInsFirstName" runat="server" ErrorMessage="VorName ist ein Pflichtfeld"
                    ControlToValidate="txtFirstName" ValidationGroup="INSERT" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Strasse" SortExpression="Street">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("Street") %>'></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEdStreet" runat="server" ErrorMessage="Strasse ist ein Pflichtfeld"
                    ControlToValidate="TextBox4" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label5" runat="server" Text='<%# Bind("Street") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label16" runat="server" Text="Strasse"></asp:Label></div>
                <asp:TextBox ID="txtStreet" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvInsStreet" runat="server" ErrorMessage="Strasse ist ein Pflichtfeld"
                    ControlToValidate="txtStreet" ValidationGroup="INSERT" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="House Nr" SortExpression="HouseNr">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox5" runat="server" Text='<%# Bind("HouseNr") %>'></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEdHouseNr" runat="server" ErrorMessage="House Nr ist ein Pflichtfeld"
                    ControlToValidate="TextBox5" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label6" runat="server" Text='<%# Bind("HouseNr") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label17" runat="server" Text="House Nr"></asp:Label></div>
                <asp:TextBox ID="txtHouseNr" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvInsHouseNr" runat="server" ErrorMessage="House Nr ist ein Pflichtfeld"
                    ControlToValidate="txtHouseNr" ValidationGroup="INSERT" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="PLZ" SortExpression="Zip">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox6" runat="server" Text='<%# Bind("Zip") %>'></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEdZip" runat="server" ErrorMessage="PLZ ist ein Pflichtfeld"
                    ControlToValidate="TextBox6" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label7" runat="server" Text='<%# Bind("Zip") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label18" runat="server" Text="PLZ"></asp:Label></div>
                <asp:TextBox ID="txtZip" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvInsZip" runat="server" ErrorMessage="PLZ ist ein Pflichtfeld"
                    ControlToValidate="txtZip" ValidationGroup="INSERT" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Ort" SortExpression="City">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox7" runat="server" Text='<%# Bind("City") %>'></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvEdCity" runat="server" ErrorMessage="Ort ist ein Pflichtfeld"
                    ControlToValidate="TextBox7" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label8" runat="server" Text='<%# Bind("City") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label19" runat="server" Text="Ort"></asp:Label></div>
                <asp:TextBox ID="txtCity" runat="server"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvInsCity" runat="server" ErrorMessage="Ort ist ein Pflichtfeld"
                    ControlToValidate="txtCity" ValidationGroup="INSERT" Text="*" ForeColor="Red">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Telefon" SortExpression="Phone">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox8" runat="server" Text='<%# Bind("Phone") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label9" runat="server" Text='<%# Bind("Phone") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label20" runat="server" Text="Telefon"></asp:Label></div>
                <asp:TextBox ID="txtPhone" runat="server"></asp:TextBox>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="E-mail" SortExpression="Email">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox9" runat="server" Text='<%# Bind("Email") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label10" runat="server" Text='<%# Bind("Email") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label21" runat="server" Text="E-mail"></asp:Label></div>
                <asp:TextBox ID="txtEmail" runat="server"></asp:TextBox>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Firma" SortExpression="Company">
            <EditItemTemplate>
                <asp:TextBox ID="TextBox10" runat="server" Text='<%# Bind("Company") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label11" runat="server" Text='<%# Bind("Company") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label22" runat="server" Text="Firma"></asp:Label></div>
                <asp:TextBox ID="txtCompany" runat="server"></asp:TextBox>
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Status" SortExpression="Active">
            <EditItemTemplate>
                <asp:DropDownList ID="DropDownList4" runat="server" DataSourceID="SqlDataSource2" DataTextField="Active" DataValueField="Active" SelectedValue='<%# Bind("Active") %>'>
                </asp:DropDownList>
                <asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:EventConnectionString %>" SelectCommand="SELECT DISTINCT [Active] FROM [Customer]"></asp:SqlDataSource>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label12" runat="server" Text='<%# Bind("Active") %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <div style="text-align: center;"><asp:Label ID="Label23" runat="server" Text="Status"></asp:Label></div>
                <asp:DropDownList ID="ddlActive" runat="server">
                    <asp:ListItem>Status Auswählen</asp:ListItem>
                    <asp:ListItem>Aktiv</asp:ListItem>
                    <asp:ListItem>Passiv</asp:ListItem>
                </asp:DropDownList>
                <asp:RequiredFieldValidator ID="rfvInsActive" runat="server" ErrorMessage="Status ist ein Pflichtfeld"
                    ControlToValidate="ddlActive" ValidationGroup="INSERT" Text="*" ForeColor="Red" InitialValue="Status Auswählen">
                </asp:RequiredFieldValidator>
            </FooterTemplate>
        </asp:TemplateField>

    </Columns>
    <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
    <HeaderStyle BackColor="#B5C7DE" Font-Bold="True" ForeColor="#4A3C8C" />
    <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Right" />
    <RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Center" />
    <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
    <SortedAscendingCellStyle BackColor="#F4F4FD" />
    <SortedAscendingHeaderStyle BackColor="#5A4C9D" />
    <SortedDescendingCellStyle BackColor="#D8D8F0" />
    <SortedDescendingHeaderStyle BackColor="#3E3277" />
</asp:GridView>
</div>
<asp:ValidationSummary ValidationGroup="INSERT" ID="ValidationSummary1" ForeColor="Red" runat="server" />
<asp:ValidationSummary ID="ValidationSummary2" ForeColor="Red" runat="server" />
<asp:SqlDataSource ID="Event" runat="server" ConnectionString="<%$ ConnectionStrings:EventConnectionString %>" DeleteCommand="DELETE FROM [Customer] WHERE [CustID] = @CustID" InsertCommand="INSERT INTO [Customer] ([Gender], [LastName], [FirstName], [Street], [HouseNr], [Zip], [City], [Phone], [Email], [Company], [Active]) VALUES (@Gender, @LastName, @FirstName, @Street, @HouseNr, @Zip, @City, @Phone, @Email, @Company, @Active)" SelectCommand="SELECT [CustID], [Gender], [LastName], [FirstName], [Street], [HouseNr], [Zip], [City], [Phone], [Email], [Company], [Active] FROM [Customer]" UpdateCommand="UPDATE [Customer] SET [Gender] = @Gender, [LastName] = @LastName, [FirstName] = @FirstName, [Street] = @Street, [HouseNr] = @HouseNr, [Zip] = @Zip, [City] = @City, [Phone] = @Phone, [Email] = @Email, [Company] = @Company, [Active] = @Active WHERE [CustID] = @CustID">
    <DeleteParameters>
        <asp:Parameter Name="CustID" Type="Decimal" />
    </DeleteParameters>
    <InsertParameters>
        <asp:Parameter Name="Gender" Type="String" />
        <asp:Parameter Name="LastName" Type="String" />
        <asp:Parameter Name="FirstName" Type="String" />
        <asp:Parameter Name="Street" Type="String" />
        <asp:Parameter Name="HouseNr" Type="String" />
        <asp:Parameter Name="Zip" Type="String" />
        <asp:Parameter Name="City" Type="String" />
        <asp:Parameter Name="Phone" Type="String" />
        <asp:Parameter Name="Email" Type="String" />
        <asp:Parameter Name="Company" Type="String" />
        <asp:Parameter Name="Active" Type="String" />
    </InsertParameters>
    <UpdateParameters>
        <asp:Parameter Name="Gender" Type="String" />
        <asp:Parameter Name="LastName" Type="String" />
        <asp:Parameter Name="FirstName" Type="String" />
        <asp:Parameter Name="Street" Type="String" />
        <asp:Parameter Name="HouseNr" Type="String" />
        <asp:Parameter Name="Zip" Type="String" />
        <asp:Parameter Name="City" Type="String" />
        <asp:Parameter Name="Phone" Type="String" />
        <asp:Parameter Name="Email" Type="String" />
        <asp:Parameter Name="Company" Type="String" />
        <asp:Parameter Name="Active" Type="String" />
        <asp:Parameter Name="CustID" Type="Decimal" />
    </UpdateParameters>
</asp:SqlDataSource>

aspx.cs

protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void lbInsert_Click(object sender, EventArgs e)
    {
        Event.InsertParameters["Gender"].DefaultValue = ((DropDownList)GridView1.FooterRow.FindControl("ddlGender")).SelectedValue;
        Event.InsertParameters["LastName"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtLastName")).Text;
        Event.InsertParameters["FirstName"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtFirstName")).Text;
        Event.InsertParameters["Street"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtStreet")).Text;
        Event.InsertParameters["HouseNr"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtHouseNr")).Text;
        Event.InsertParameters["Zip"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtZip")).Text;
        Event.InsertParameters["City"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtCity")).Text;
        Event.InsertParameters["Phone"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtPhone")).Text;
        Event.InsertParameters["Email"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtEmail")).Text;
        Event.InsertParameters["Company"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtCompany")).Text;
        Event.InsertParameters["Active"].DefaultValue = ((DropDownList)GridView1.FooterRow.FindControl("ddlActive")).SelectedValue;

        Event.Insert();
    }

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            var dr = e.Row.DataItem as DataRowView;

            if (dr["CustID"].ToString() == "60" || dr["CustID"].ToString() == "62")
            {
                e.Row.Enabled = false;  //OR dr.Enabled = false;
                //DISABLED Controls only     
                //((TextBox)e.Row.FindControl("TextBox1")).Enabled = false;
            }
        }
    }

Answer 1

private void BindGrid()
{
    //Your Code For Fill the Grid...Possibly If You Use Database than Fired Query to fetch data and fill Grid...
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        var dr = e.Row.DataItem as DataRowView;

        if (dr["CustID"].ToString() == "60" || dr["CustID"].ToString() == "62")
        {
            e.Row.Enabled = false;  //OR dr.Enabled = false;
            //DISABLED Controls only     
            //((TextBox)e.Row.FindControl("TextBox1")).Enabled = false;
        }
    }
    BindGrid();
}

Answer 2

创建一种方法来绑定网格，当您将数据插入网格时，不仅仅是调用此方法来绑定网格...试试这个...

Answer 3

你所需要的是使用

Response.Redirect(Request.Url.AbsolutePath);

在按钮单击事件代码的底部使用它

 protected void lbInsert_Click(object sender, EventArgs e)
    {
        Event.InsertParameters["Gender"].DefaultValue = ((DropDownList)GridView1.FooterRow.FindControl("ddlGender")).SelectedValue;
        Event.InsertParameters["LastName"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtLastName")).Text;
        Event.InsertParameters["FirstName"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtFirstName")).Text;
        Event.InsertParameters["Street"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtStreet")).Text;
        Event.InsertParameters["HouseNr"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtHouseNr")).Text;
        Event.InsertParameters["Zip"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtZip")).Text;
        Event.InsertParameters["City"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtCity")).Text;
        Event.InsertParameters["Phone"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtPhone")).Text;
        Event.InsertParameters["Email"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtEmail")).Text;
        Event.InsertParameters["Company"].DefaultValue = ((TextBox)GridView1.FooterRow.FindControl("txtCompany")).Text;
        Event.InsertParameters["Active"].DefaultValue = ((DropDownList)GridView1.FooterRow.FindControl("ddlActive")).SelectedValue;

        Event.Insert();
        Response.Redirect(Request.Url.AbsolutePath);
    }