我已经花了 2 天时间试图解决这个问题，但没有运气解决这个问题。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的功能。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>
问题是点击更新按钮后我无法更新某条记录，请看下图：
当我处于调试模式时，它不会传递 OnRowUpdating 事件，而是传递给 OnRowEditing。令我惊讶的一件事是，当它触发 OnRowCommand 时，当单击更新按钮时，CommandName 设置为“编辑”。请看下图：
顺便说一句，这是背后的代码。
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()");
}
}