你好，对于你的“如何获取Gridview中编辑字段的值?”这个问题我有个类似的问题寻求下帮助

你的这个Id是指主键吗？
如果是主键，你可以到GridView里面去设定成如：
DataKeyNames="id"


获取的时候：
///

/// 删除信息事件
///

///
///
protected void gdvUserInfo_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string id =gdvUserInfo.DataKeys[e.RowIndex].Value.ToString();
if (info.DeleteUserInfoById(id) > 0)
{
this.lblMessage.Text = "删除成功！";
LoadInfo();
}
else
{
this.lblMessage.Text = "删除失败！";
LoadInfo();
}
}

///

/// 编辑事件
///

///
///
protected void gdvUserInfo_RowEditing(object sender, GridViewEditEventArgs e)
{
gdvUserInfo.EditIndex = e.NewEditIndex;
LoadInfo();
}

///

/// 取消编辑事件
///

///
///
protected void gdvUserInfo_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
gdvUserInfo.EditIndex = -1;
LoadInfo();
}

///

/// 更新事件
///

///
///
protected void gdvUserInfo_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
string userId = gdvUserInfo.DataKeys[e.RowIndex].Value.ToString();
TextBox txtUserId = (TextBox)gdvUserInfo.Rows[e.RowIndex].Cells[0].FindControl("txtUserId");
TextBox txtUserName = (TextBox)gdvUserInfo.Rows[e.RowIndex].Cells[0].FindControl("txtUserName");
TextBox txtPassWord = (TextBox)gdvUserInfo.Rows[e.RowIndex].Cells[0].FindControl("txtPassWord");
if (txtUserName != null && txtPassWord != null)
{
try
{
UserInfo user = info.GetUserInfoById(userId);
user.UserName = txtUserName.Text.ToString();
user.Password = txtPassWord.Text.ToString();
if (info.ModifyUserInfo(user) > 0)
{
this.lblMessage.Text = "修改成功！";
gdvUserInfo.EditIndex = -1;
LoadInfo();
}
else
{
this.lblMessage.Text = "修改失败！";
gdvUserInfo.EditIndex = -1;
LoadInfo();
}
}
catch (Exception)
{

this.lblMessage.Text = "修改失败！";
gdvUserInfo.EditIndex = -1;
LoadInfo();
}
}
}

///

///
/// 光棒事件
///

///
///
protected void gdvUserInfo_RowDataBound(object sender, GridViewRowEventArgs e)
{
for (int i = 0; i < gdvUserInfo.Rows.Count; i++)
{
if (gdvUserInfo.Rows[i].RowType == DataControlRowType.DataRow)
{
gdvUserInfo.Rows[i].Attributes.Add("onmouseover", "c=this.style.backgroundColor;this.style.backgroundColor='#9cf'");
gdvUserInfo.Rows[i].Attributes.Add("onmouseout", "this.style.backgroundColor=c");
}
}
}

你的GridView中的修改文本框是个TextBox吧？你检查直接在前台为他加上ID= "txtD_Name" 就行了，例如