Question

我已经花了2天时间试图解决这个问题但是如何解决这个问题却没有运气。我有一个GridView来显示数据库中的数据，然后它还具有修改和删除功能。这是我的GridView的当前ASP代码：

<asp:GridView ID="dgvSortKey" runat="server" AllowSorting="True" OnRowDataBound="gv_drb"
                AutoGenerateColumns="False" AllowPaging="True" BackColor="White" BorderColor="#336666"
                BorderStyle="Double" BorderWidth="3px" CellPadding="4" GridLines="Horizontal"
                Height="73px" AutoGenerateEditButton="True" OnRowEditing="dgvSortKey_RowEditing"
                OnRowUpdating="dgvSortKey_RowUpdating" OnRowCancelingEdit="dgvSortKey_RowCancelingEdit"
                OnSelectedIndexChanging="dgvSortKey_SelectedIndexChanging" OnPageIndexChanged="dgvSortKey_PageIndexChanged"
                OnPageIndexChanging="dgvSortKey_PageIndexChanging" OnRowCommand="dgvSortKey_RowCommand"
                OnRowDeleted="dgvSortKey_RowDeleted" OnRowUpdated="dgvSortKey_RowUpdated" Width="561px"
                PageSize="15" DataKeyNames="KeyCode,KeyDescription">
                <FooterStyle BackColor="White" ForeColor="#333333" />
                <RowStyle BackColor="White" ForeColor="#333333" />
                <PagerStyle BackColor="#336666" ForeColor="White" HorizontalAlign="Center" />
                <SelectedRowStyle BackColor="#339966" Font-Bold="True" ForeColor="White" />
                <HeaderStyle BackColor="#336666" Font-Bold="True" ForeColor="White" HorizontalAlign="Center" />
                <AlternatingRowStyle BackColor="LightCyan" />
                <Columns>
                    <asp:TemplateField HeaderText="">
                        <ItemTemplate>
                            <asp:LinkButton ID="lnkdelete" runat="server" OnClick="lnkdelete_Click">Delete</asp:LinkButton>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Instruction Key Code">
                        <ItemTemplate>
                            <asp:Label ID="lblValKeyCode" runat="server" Text='<%#System.Web.HttpUtility.HtmlEncode((string)Eval("KeyCode")) %>'></asp:Label>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox ID="txtValKeyCode" runat="server" Text='<%#Bind("KeyCode") %>' MaxLength="10"
                                CausesValidation="false"></asp:TextBox>
                        </EditItemTemplate>
                        <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" CssClass="GvBorderGreen" />
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Description">
                        <ItemTemplate>
                            <asp:Label ID="lblValKeyDescription" runat="server" Text='<%#System.Web.HttpUtility.HtmlEncode((string)Eval("KeyDescription")) %>'></asp:Label>
                        </ItemTemplate>
                        <EditItemTemplate>
                            <asp:TextBox ID="txtValKeyDescription" runat="server" Text='<%#Bind("KeyDescription") %>'
                                Width="300" MaxLength="20" CausesValidation="false"></asp:TextBox>
                        </EditItemTemplate>
                        <ItemStyle CssClass="GvBorderGreen" />
                    </asp:TemplateField>
                </Columns>
            </asp:GridView>

问题是我点击更新按钮后无法更新某个记录，请参阅下图：

enter image description here

当我处于调试模式时，它不传递OnRowUpdating事件，而是传递给OnRowEditing。令我惊讶的一件事是，当它触发OnRowCommand时，当 更新按钮 <时，CommandName设置为 “编辑” 单击/ strong>。请参阅下图：

顺便说一句，这就是守则背后。

protected void dgvSortKey_RowUpdating(object sender, GridViewUpdateEventArgs e) { //Currently Unreachable code due to unknown reason. RowUpdating not trigger even clicking Update Button in the GridView // this.dvDetialContent.Visible = true; List<SqlDbParameter> list = new List<SqlDbParameter>(); TextBox txtValKeyDescription = dgvSortKey.Rows[e.RowIndex].FindControl("txtValKeyDescription") as TextBox; TextBox txtValKeyCode = dgvSortKey.Rows[e.RowIndex].FindControl("txtValKeyCode") as TextBox; if (string.IsNullOrEmpty(txtValKeyCode.Text) || string.IsNullOrEmpty(txtValKeyDescription.Text)) { string alert = "alert('Instruction KeyCode or KeyDecription should not be empty');"; ScriptManager.RegisterStartupScript(this, this.GetType(), "scripting", alert, true); } else { //Trace.Write("txtKeyCode", HttpUtility.HtmlDecode(txtKeyCode.Text)); //Trace.Write("txtKeyDescription", txtKeyDescription.Text); //Trace.Write("txtValKeyCode", txtValKeyCode.Text); //Trace.Write("txtValKeyDescription", txtValKeyDescription.Text); list.Add(new SqlDbParameter("@oldcode", HttpUtility.HtmlDecode(txtKeyCode.Text))); list.Add(new SqlDbParameter("@oldname", HttpUtility.HtmlDecode(txtKeyDescription.Text))); list.Add(new SqlDbParameter("@newcode", HttpUtility.HtmlDecode(txtValKeyCode.Text))); list.Add(new SqlDbParameter("@newname", HttpUtility.HtmlDecode(txtValKeyDescription.Text))); try { int result = CoreUtility.ExecuteNonQuery("update InstructionKey set KeyCode=@newcode, KeyDescription=@newname where KeyCode = @oldcode and KeyDescription = @oldname", list); //Trace.Write("ResultValue", result.ToString()); } catch (Exception ex) { string alert = "alert('Instruction KeyCode should not be duplicate');"; ScriptManager.RegisterStartupScript(this, this.GetType(), "scripting2", alert, true); } } dgvSortKey.EditIndex = -1; imgbtnFilter_Click(null, null); this.txtKeyCode.Text = ""; this.txtKeyDescription.Text = ""; } protected void dgvSortKey_RowEditing(object sender, GridViewEditEventArgs e) { // this.dvDetialContent.Visible = true; //if (ViewState["updateFlag"] == null) //{ //ViewState["editFlag"] = "forEdit"; //ViewState["editIndex"] = e.NewEditIndex; dgvSortKey.EditIndex = e.NewEditIndex; Label lblValKeyDescription = dgvSortKey.Rows[e.NewEditIndex].FindControl("lblValKeyDescription") as Label; Label lblValKeyCode = dgvSortKey.Rows[e.NewEditIndex].FindControl("lblValKeyCode") as Label; this.txtKeyCode.Text = lblValKeyCode.Text; this.txtKeyDescription.Text = lblValKeyDescription.Text; imgbtnFilter_Click(null, null); //} //else //{ //RowUpdate((int)ViewState["editIndex"]); //ViewState.Remove("updateFlag"); //ViewState.Remove("editFlag"); //ViewState.Remove("editIndex"); //} } protected void dgvSortKey_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e) { dgvSortKey.EditIndex = -1; imgbtnFilter_Click(null, null); } protected void dgvSortKey_SelectedIndexChanging(object sender, GridViewSelectEventArgs e) { this.dvDetialContent.Visible = true; Label lblValKeyDescription = dgvSortKey.Rows[e.NewSelectedIndex].FindControl("lblValKeyDescription") as Label; Label lblValKeyCode = dgvSortKey.Rows[e.NewSelectedIndex].FindControl("lblValKeyCode") as Label; this.txtKeyCode.Text = lblValKeyCode.Text; this.txtKeyDescription.Text = lblValKeyDescription.Text; } protected void dgvSortKey_PageIndexChanged(object sender, EventArgs e) { } protected void dgvSortKey_PageIndexChanging(object sender, GridViewPageEventArgs e) { dgvSortKey.PageIndex = e.NewPageIndex; imgbtnFilter_Click(null, null); } protected void dgvSortKey_RowUpdated(object sender, GridViewUpdatedEventArgs e) { } protected void dgvSortKey_RowDeleting(object sender, GridViewDeleteEventArgs e) { String jsScript = ""; jsScript += "var answer=confirm('Delete this Instruction Key?');\n"; jsScript += "if (!answer){\n"; jsScript += " document.getElementById('ctl00_cthContent_hdDelete').Value = 'DELETE';\n"; jsScript += "}\n"; //return; ScriptManager.RegisterStartupScript(this, this.GetType(), "script", jsScript, true); List<SqlDbParameter> list = new List<SqlDbParameter>(); Label lblValKeyCode = dgvSortKey.Rows[e.RowIndex].FindControl("lblValKeyCode") as Label; Label lblValKeyDescription = dgvSortKey.Rows[e.RowIndex].FindControl("lblValKeyDescription") as Label; list.Add(new SqlDbParameter("@code", lblValKeyCode.Text)); list.Add(new SqlDbParameter("@name", lblValKeyDescription.Text)); CoreUtility.ExecuteNonQuery("DELETE FROM [InstructionKey] WHERE KeyCode=@code and KeyDescription=@name;", list); Initial(); this.dvDetialContent.Visible = false; dgvSortKey.EditIndex = -1; imgbtnFilter_Click(null, null); } protected void dgvSortKey_RowCommand(object sender, GridViewCommandEventArgs e) { string id = e.CommandName; } protected void dgvSortKey_RowDeleted(object sender, GridViewDeletedEventArgs e) { } protected void gv_drb(object sender, GridViewRowEventArgs e)// { if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton lnkbtnresult = (LinkButton)e.Row.FindControl("lnkdelete"); //raising javascript confirmationbox whenver user clicks on link button lnkbtnresult.Attributes.Add("onclick", "javascript:return ConfirmationBox()"); } }

Answer 1

虽然我还没有弄清楚这个错误，但您可能需要尝试一种解决方法由于自动生成的编辑按钮会给您带来麻烦，为什么不自己生成呢？

像这样：

<asp:TemplateField HeaderText="">
    <ItemTemplate>
        <asp:LinkButton ID="lnkedit" runat="server" CommandName="Edit">Edit</asp:LinkButton>
    </ItemTemplate>
    <EditItemTemplate>
        <asp:LinkButton ID="lnkedit" runat="server" CommandName="Update">Update</asp:LinkButton>
        <asp:LinkButton ID="lnkedit" runat="server" CommandName="Cancel">Cancel</asp:LinkButton>
    </EditItemTemplate> 
</asp:TemplateField>

并在你的代码中处理它：

  void dgvSortKey_RowCommand(Object sender, GridViewCommandEventArgs e)
  {
    // If multiple buttons are used in a GridView control, use the
    // CommandName property to determine which button was clicked.
    if(e.CommandName=="Update")
    {

    }
  }

由于CommandName =“edit”，GridView OnRowUpdating不会触发

1 个答案: