单击Gridview按钮后，数据库不会更新

Question

我有一个网格视图，其中包含一个复选框列和另一列信息。检查或取消选中后，我想根据复选框的内容更新数据库。但是，单击按钮后，似乎已删除Checkbox选中的属性值，并在onClick事件发生之前返回其原始状态，并且数据库永远不会更新。

ASPX

<div>

    <asp:gridview runat="server" id="MeasuresGrid"  autogeneratecolumns="False" cssclass="SelectionHeader" onrowdatabound="MeasuresGrid_OnRowDataBound" datakeynames="SubSectionId">
        <AlternatingRowStyle BackColor="#cce1ec"></AlternatingRowStyle>
        <Columns>
            <asp:TemplateField HeaderText="Applicable Measures?" ItemStyle-Width="5%" ItemStyle-HorizontalAlign="center">
              <ItemTemplate>
                  <asp:CheckBox ID="MeasureChckBox" CommandName="CheckBox" Checked='<%# Eval("IsSelected") %>' CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" runat="server" />
              </ItemTemplate>

        </asp:TemplateField>
            <asp:BoundField HeaderText="Measure" DataField="SubSection">

                </asp:BoundField>


             </Columns>
    </asp:gridview>
</div>

<asp:updatepanel runat="server">
    <ContentTemplate>
<table style="width: 100%">
    <tr>
        <td style="width: 50%; text-align: left">
            <asp:button id="btnCancel" runat="server" text="Cancel" cssclass="hrsaSkingreybtn" />
        </td>
        <td style="width: 50%; text-align: right">
            <asp:button id="btnSave" runat="server" text="Save" cssclass="hrsaSkingreybtn" OnClick="btnSave_OnClick" />
        </td>
    </tr>
</table>
        </ContentTemplate>
    </asp:updatepanel>

ASPX.cs

protected void MeasuresGrid_OnRowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            var measureChckBox = (e.Row.FindControl("MeasureChckBox") as CheckBox);
            foreach (var x in MeasurePrefixArray)
            {
                if (e.Row.Cells[1].Text.StartsWith(x))
                {
                    if (measureChckBox != null)
                    {
                        measureChckBox.Checked = true;
                        measureChckBox.Enabled = false;
                    }
                }
            }

        }
    }

protected void btnSave_OnClick(object sender, EventArgs e)
    {


        foreach (GridViewRow row in MeasuresGrid.Rows)
        {
            try
            {
                //Retrieve isSelected value
                var selectQuery =
                    @"select IsSelected from MHF.FlexMeasureSelection where RptInstanceId = @ReportInstanceId and SubSectionId = @SubSectionId";
                var dataKey = MeasuresGrid.DataKeys[row.RowIndex];
                if (dataKey != null)
                {
                    if (dataKey.Value != null)
                    {
                        subSectionId = Convert.ToInt32(dataKey.Value);
                    }
                }
                if (conn.State == ConnectionState.Closed)
                    conn = DbAgent.selfRef().getConnection("default");
                var command = new SqlCommand(selectQuery, conn)
                {
                    CommandType = CommandType.Text
                };
                command.Parameters.AddWithValue("@ReportInstanceId", apSess.ReportInstanceID);
                command.Parameters.AddWithValue("@SubSectionId", subSectionId);
                var isSelected = Convert.ToInt32(command.ExecuteScalar());

                var chk = (CheckBox) row.Cells[0].FindControl("MeasureChckBox");
                var updateQuery =
                    @"update MHF.FlexMeasureSelection set IsSelected = @IsSelected where RptInstanceId = @ReportInstanceId and SubSectionId = @SubSectionId";
                if (conn.State == ConnectionState.Closed)
                    conn = DbAgent.selfRef().getConnection("default");
                var command1 = new SqlCommand(updateQuery, conn)
                {
                    CommandType = CommandType.Text
                };
                command1.Parameters.AddWithValue("@RptInstanceId", apSess.ReportInstanceID);
                command1.Parameters.AddWithValue("@SubSectionId", subSectionId);
                if (chk != null)
                {
                    //handle deletion from A330 Data Table  and disable display from form
                    var checkedVal = 0;
                    if (isSelected == 1 && !chk.Checked)
                    {
                        //update FlexMeasureSelection Table
                        checkedVal = 0;
                        command1.Parameters.AddWithValue("@IsSelected", checkedVal);
                        command1.ExecuteNonQuery();
                        lbConfirmationMessage.Visible = true;
                        lbConfirmationMessage.Text = @"Selections have been saved";

                    }
                    else if (isSelected == 0 && chk.Checked) //enable display with form
                    {
                        //update FlexMeasureSelection Table
                        checkedVal = 1;
                        command1.Parameters.AddWithValue("@IsSelected", checkedVal);
                        command1.ExecuteNonQuery();
                        lbConfirmationMessage.Visible = true;
                        lbConfirmationMessage.Text = @"Selections have been saved";

                    }
                    conn.Close();

                }
            }
            catch (Exception ex)
            {
                AppLogger.selfRef().log("Error in SelectionPage.aspx.cs btnSave_OnClick", AppLogger.logLevel.error);
                var ex2 = new AppException(CORE.Utilities.AppException.ErrorCode.DB, ORHP.AppObjects.AppIni.selfRef().XmlErrorCodes, ex);
                throw ex2;
            }
        }
        MeasuresGrid.DataBind();
    }