在Gridview中进行更新操作后，会添加带逗号的重复值

我正在使用一个具有添加、更新和删除功能的嵌套网格视图。添加和删除操作工作成功。在更新内部网格的特定条目时存在一个问题，它使用逗号分隔的前一个值更新值。我不知道为什么会这样。

当更新外部网格值时，它更新得很好，没有重复的值。

我的嵌套gridview代码:

<asp:GridView ID="grdViewMaster" runat="server" AutoGenerateColumns="false" 
    DataKeyNames="MasterID" CssClass="dataTable" ShowFooter="true"
    OnRowCommand="grdViewMaster_RowCommand" OnRowEditing="grdViewMaster_RowEditing" 
    OnRowUpdating="grdViewMaster_RowUpdating"
    OnRowDeleting="grdViewMaster_RowDeleting" 
    OnRowCancelingEdit="grdViewMaster_RowCancelingEdit" 
    OnRowDataBound="grdViewMaster_OnRowDataBound">
    <Columns>
        <asp:TemplateField HeaderText="Options" ItemStyle-CssClass="mastertabletd" HeaderStyle-CssClass="mastertabletd" FooterStyle-CssClass="mastertabletd">
            <EditItemTemplate>
                <asp:ImageButton ID="imgbtnUpdateMaster" CommandName="Update" runat="server" ImageUrl="~/images/1-update.png" ToolTip="Update" Height="15px" Width="15px" />
                <asp:ImageButton ID="imgbtnCancelMaster" runat="server" CommandName="Cancel" ImageUrl="~/images/1-Cancel.png" ToolTip="Cancel" Height="15px" Width="15px" />
            </EditItemTemplate>
            <ItemTemplate>
                <asp:ImageButton ID="imgbtnEditMaster" CommandName="Edit" runat="server" ImageUrl="~/images/1-edit.png" ToolTip="Edit" Height="15px" Width="15px" />
                <asp:ImageButton ID="imgbtnDeleteMaster" CommandName="Delete" ImageUrl="~/images/delete.png" runat="server" ToolTip="Delete" Height="15px" Width="15px" />
                <a href="javascript:divexpandcollapse('div<%# Eval("MasterID")%>')">
                    <img id='imgdiv<%# Eval("MasterID")%>' alt="Details" src="images/plus.png" />
                </a>
            </ItemTemplate>
            <FooterTemplate>
                <asp:ImageButton ID="imgbtnAddMaster" runat="server" ImageUrl="~/images/1-add.png" CommandName="AddNewMaster" Width="15px" Height="15px" ToolTip="Add new User" ValidationGroup="validaiton" />
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Style #" ItemStyle-CssClass="mastertabletd" HeaderStyle-CssClass="mastertabletd" FooterStyle-CssClass="mastertabletd">
            <EditItemTemplate>
                <asp:TextBox ID="txtEditStyleID" runat="server" Text='<%#Eval("StyleID") %>' />
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="txtStyleID" runat="server" Text='<%# Eval("StyleID") %>' />                  
            </ItemTemplate>
            <FooterTemplate>
                <asp:TextBox ID="txtftrStyleID" runat="server" CssClass="width90per" />
            </FooterTemplate>
        </asp:TemplateField>
        <asp:TemplateField ItemStyle-Width="0" HeaderStyle-Width="0" 
            FooterStyle-Width="0" ItemStyle-CssClass="mastertabletd" 
            HeaderStyle-CssClass="mastertabletd" FooterStyle-CssClass="mastertabletd">
            <ItemTemplate>
                <div id='div<%# Eval("MasterID")%>' style="display: none;" class="dataTables_wrapper">
                    <asp:GridView ID="gvExcelData" DataKeyNames="ID" runat="server" 
                        GridLines="Horizontal" ShowFooter="true" CssClass="dataTable" 
                        BorderStyle="None" EmptyDataText="No Data Found" 
                        AutoGenerateColumns="False" 
                        OnRowCommand="gvExcelData_RowCommand" 
                        OnRowEditing="gvExcelData_RowEditing" 
                        OnRowUpdating="gvExcelData_RowUpdating" 
                        OnRowDeleting="gvExcelData_RowDeleting" 
                        OnRowCancelingEdit="gvExcelData_RowCancelingEdit">
                        <EmptyDataRowStyle CssClass="form-horizontal fill-up validatable width100per" />
                        <Columns>
                            <asp:TemplateField HeaderText="Options">
                                <EditItemTemplate>
                                    <asp:ImageButton ID="imgbtnUpdate" CommandName="Update" runat="server" ImageUrl="~/images/1-update.png" ToolTip="Update" Height="15px" Width="15px" />
                                    <asp:ImageButton ID="imgbtnCancel" runat="server" CommandName="Cancel" ImageUrl="~/images/1-Cancel.png" ToolTip="Cancel" Height="15px" Width="15px" />
                                </EditItemTemplate>
                                <ItemTemplate>
                                    <asp:ImageButton ID="imgbtnEdit" CommandName="Edit" runat="server" ImageUrl="~/images/1-edit.png" ToolTip="Edit" Height="15px" Width="15px" />
                                    <asp:ImageButton ID="imgbtnDelete" CommandName="Delete" Text="Edit" runat="server" ImageUrl="~/Images/delete.png" ToolTip="Delete" Height="15px" Width="15px" />
                                </ItemTemplate>
                                <FooterTemplate>
                                    <asp:ImageButton ID="imgbtnAdd" runat="server" ImageUrl="~/images/1-add.png" CommandArgument='<%# Eval("MasterID") %>' OnClientClick="return validateInputField(this);" CommandName="AddNew" Width="15px" Height="15px" ToolTip="Add new User" ValidationGroup="validaiton" />
                                </FooterTemplate>
                            </asp:TemplateField> 
                            <asp:TemplateField HeaderText="Vendor #">
                                <EditItemTemplate>
                                    <asp:TextBox ID="txtVendorID" runat="server" Text='<%# Eval("VendorID") %>' />
                                </EditItemTemplate>
                                <ItemTemplate>
                                    <div style="display: none">
                                        <asp:Label ID="lblMasterID" runat="server" Text='<%# Eval("MasterID") %>' />
                                    </div>
                                    <%#Eval("VendorID") %>                                                                               
                                </ItemTemplate>
                                <FooterTemplate>
                                    <asp:TextBox ID="txtftrVendorID" CssClass="txtftrVendorID" runat="server" />
                                </FooterTemplate>
                            </asp:TemplateField>
                        </Columns>
                        <PagerStyle CssClass="custom-pagination" />
                        <PagerSettings Mode="NumericFirstLast" FirstPageText="Prev" LastPageText="Next" PageButtonCount="5" Position="Bottom" />
                        <FooterStyle CssClass="custom-footer" />
                    </asp:GridView>
                </div>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

这是我的cs文件代码。

string gvUniqueID = String.Empty;    
int gvEditIndex = -1;
protected void grdViewMaster_RowCommand(object sender, GridViewCommandEventArgs e)
{
    try
    {
        if (e.CommandName.Equals("AddNewMaster"))
        {
            if (isChildAdded)
                return;
            TextBox txtStyleID = (TextBox)grdViewMaster.FooterRow.FindControl("txtftrStyleID");
            string StyleID = txtStyleID.Text;
            if (StyleID != string.Empty)
            {
                InsertMasterRecord(StyleID); /* My Database function which Insert values to database */;
                BindMasterGrid();
            }
        }
    }
    catch (Exception ex)
    {
        Common.LogError(ex);
        throw ex;
    }
}
protected void grdViewMaster_RowEditing(Object sender, GridViewEditEventArgs e)
{
    grdViewMaster.EditIndex = e.NewEditIndex;
    BindMasterGrid();
}
// in that master row update, this works fine. no duplicate data here.
protected void grdViewMaster_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    try
    {
        int recordId = Convert.ToInt32(grdViewMaster.DataKeys[e.RowIndex].Value.ToString());
        TextBox txtStyleID = (TextBox)grdViewMaster.Rows[e.RowIndex].FindControl("txtEditStyleID");
        string StyleID = txtStyleID.Text;
        if (StyleID != string.Empty)
        {
            UpdateMasterRecord(StyleID, recordId);  /* My Database function which updates this values */;
            grdViewMaster.EditIndex = -1;
            BindMasterGrid();                
        }
    }
    catch (Exception ex)
    {
        throw ex;
    }
}
protected void grdViewMaster_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
    // my delete logic here which works fine.
}
protected void grdViewMaster_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
    grdViewMaster.EditIndex = -1;
    BindMasterGrid();
}
protected void grdViewMaster_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    GridViewRow row = e.Row;
    string strSort = string.Empty;
    if (row.DataItem == null)
    {
        return;
    }
    GridView gv = new GridView();
    gv = (GridView)row.FindControl("gvExcelData"); // for binding the inner grid datas.
    if (gv.UniqueID == gvUniqueID)
    {
        gv.PageIndex = gvNewPageIndex;
        gv.EditIndex = gvEditIndex;           
    }
    gv.DataSource = /* My Database function which returns DataTable*/;
    gv.DataBind();
}
protected void gvExcelData_RowCommand(object sender, GridViewCommandEventArgs e)
{
    try
    {
        GridView gvExcelData = (GridView)sender;
        if (e.CommandName.Equals("AddNew"))
        {
            Label lblMasterID = (Label)gvExcelData.NamingContainer.FindControl("lblMasterID");
            int masterID = Convert.ToInt32(lblMasterID.Text);
            TextBox txtVendorID = (TextBox)gvExcelData.FooterRow.FindControl("txtftrVendorID");
            string vendorID = txtVendorID.Text;
            if (masterID != 0)
            {
                insertToDatabase(masterID,vendorID); // my inserted database logic here..
                BindMasterGrid();
            }
        }
    }
    catch (Exception ex)
    {
        throw ex;
    }
}
protected void gvExcelData_RowEditing(object sender, GridViewEditEventArgs e)
{
    GridView gvTemp = (GridView)sender;
    gvUniqueID = gvTemp.UniqueID;
    gvEditIndex = e.NewEditIndex;       
    BindMasterGrid();
}
// here i got the duplicate values by comma separated while updating the values.
protected void gvExcelData_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    try
    {
        GridView gvExcelData = (GridView)sender;
        GridViewRow gr = gvExcelData.Rows[e.RowIndex];
        int recordId = Convert.ToInt32(gvExcelData.DataKeys[e.RowIndex].Value.ToString());
        TextBox txtVendorID = (TextBox)gr.FindControl("txtVendorID");
        string vendorID = txtVendorID.Text;
        UpdateToDatabase(recordId,VendorID); // my method for updating the database values.
        gvExcelData.EditIndex = -1;
        BindMasterGrid();
    }
    catch (Exception ex)
    {
        throw ex;
    }
}
protected void gvExcelData_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
    // my delete methods for deleting the values which works superb.
}
protected void gvExcelData_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
    GridView gvExcelData = (GridView)sender;
    gvExcelData.EditIndex = -1;
    BindMasterGrid();
}

请帮我解决这个问题。

string vendorID = txtVendorID.Text;
insertToDatabase(masterID,vendorID);

string vendorID = txtVendorID.Text;
UpdateToDatabase(recordId,VendorID);