GridView에서 EditItemTemplate 컨트롤의 값을 변경하는 방법

Question

안녕하세요 GridView 컨트롤이 있고 EditItemTemplate 필드 안에 TextBox 컨트롤이 있습니다.
이제 사용자가 편집 모드로 들어갈 때 텍스트 상자 텍스트를 변경해야합니다.
프로그램을 실행하면 텍스트 상자는 ItemTemplate에 있던 레이블 값을 가져오고 텍스트 상자에 액세스 할 수 없습니다.
에서 .aspx :

<asp:GridView runat="server" ID="GridView1" AutoGenerateColumns="False" 
ShowHeader="False" onrowcommand="GridView1_RowCommand" 
onrowediting="GridView1_RowEditing" OnRowCancelingEdit="GridView1_Cancel" 
onrowupdating="GridView1_RowUpdating" onrowdeleting="GridView1_RowDeleting" 
onrowdatabound="GridView1_RowDataBound" DataKeyNames="TweetID"> 
<Columns> 
<asp:TemplateField HeaderText="ProfilePicture"> 
<ItemTemplate> 
<asp:ImageButton ID="ProfileImage" runat="server" CommandName="Redirect" 
CommandArgument='<%# Container.DataItemIndex %>' Height="40px" Width="40px" /> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="FullName"> 
<ItemTemplate> 
<asp:label ID="FullNameLabel" runat="server" text='<%#Eval("FullName") %>'></asp:label> 
</ItemTemplate> 
</asp:TemplateField> 

<asp:TemplateField HeaderText="UserName"> 
<ItemTemplate> 
<asp:Label ID="UserNameLabel" runat="server" Text='<%#Eval("UserName") %>'></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="Tweet"> 
<ItemTemplate> 
<%--<asp:Label ID="TweetLabel" runat="server" Text='<%#Eval("TweetText") %>'></asp:Label>--%> 
<asp:Label ID="TweetLabel" runat="server" Text=""></asp:Label> 
</ItemTemplate> 

<EditItemTemplate> 
<asp:TextBox ID="TweetTB" runat="server" Text='<%#Eval("TweetText") %>'></asp:TextBox> 
</EditItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="Picture"> 
<ItemTemplate> 
<asp:Image ID="TweetPic" runat="server" 
ImageUrl='<%#"~/UploadedImages/"+Eval("PicName") %>' Height="125px" Width="222px" /> 
</ItemTemplate> 
</asp:TemplateField> 

<asp:TemplateField HeaderText="ReTweet"> 
<ItemTemplate> 
<asp:ImageButton ID="ReTweetImgBTN" runat="server" 
ImageUrl="~/SrcImage/retweet-action.png" Height="27px" Width="29px" 
CommandName="ReTweet" CommandArgument='<%# Container.DataItemIndex %>'/> 
<%--<asp:Label ID="ReTweetEd" runat="server" Text="ReTweetEd" Visible="false"></asp:Label>--%> 
<%--<asp:Button ID="ReTweetBTN" runat="server" Text="ReTweet" CommandName="ReTweet" CommandArgument='<%# Container.DataItemIndex %>' />--%> 
<asp:Label ID="ReTweetStat" runat="server" Visible="false"></asp:Label> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="Like"> 
<ItemTemplate> 
<asp:ImageButton ID="LikeImgBTN" runat="server" ImageUrl="~/SrcImage/like-action.png" 
Height="27px" Width="29px" CommandName="Like" CommandArgument='<%# Container.DataItemIndex %>'/> 
<%--<asp:Button ID="LikeBTN" runat="server" Text="Like" CommandName="Like" CommandArgument='<%# Container.DataItemIndex %>' />--%> 
<asp:Label ID="LikeStat" runat="server" Visible="false"></asp:Label> 
    </ItemTemplate> 
</asp:TemplateField> 

<asp:TemplateField HeaderText="Options"> 
<ItemTemplate> 
<asp:LinkButton ID="Edit" runat="server" Text="Edit" CommandName="Edit" /> 
</ItemTemplate> 
<EditItemTemplate> 
<asp:LinkButton ID="Delete" runat="server" Text="Delete" CommandName="Delete" /> 
<asp:LinkButton ID="btn_Update" runat="server" Text="Update" CommandName="Update"/> 
<asp:LinkButton ID="btn_Cancel" runat="server" Text="Cancel" CommandName="Cancel"/> 
</EditItemTemplate> 
</asp:TemplateField> 
<asp:TemplateField HeaderText="TweetID" Visible="false"> 
<ItemTemplate> 
<asp:HiddenField ID="TweetID" runat="server" Value='<%#Eval("TweetID") %>' /> 
</ItemTemplate> 
</asp:TemplateField> 

<asp:TemplateField HeaderText="UserID" Visible="false"> 
<ItemTemplate> 
<asp:HiddenField ID="UserID" runat="server" Value='<%#Eval("UserID") %>'/> 
</ItemTemplate> 
</asp:TemplateField> 

</Columns> 
</asp:GridView> 

.cs 다음 RowEditing 이벤트에서

protected void Page_Load(object sender, EventArgs e) 
    { 
     Session["UserID"] = 1; // To be removed 
     if(!IsPostBack) 
      BindGridview(); 
    } 
    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) 
    { 
     int userId = int.Parse(Session["UserID"].ToString()); 
     if (e.CommandName == "Like") 
     { 
      int index = Convert.ToInt32(e.CommandArgument); 
      if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(int.Parse(GridView1.DataKeys[index].Value.ToString()))) 
      { 
       int ReTweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(int.Parse(GridView1.DataKeys[index].Value.ToString())); 
       int tweetID = ReTweetHelper.GetTweetIDFromReTweetByReTweetID(ReTweetID); 
       LikeHelper.Like(tweetID, userId); 
      } 
      else 
       LikeHelper.Like(int.Parse(GridView1.DataKeys[index].Value.ToString()), userId); 
     } 
     if (e.CommandName == "ReTweet") 
     { 
      int index = Convert.ToInt32(e.CommandArgument); 
      if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(int.Parse(GridView1.DataKeys[index].Value.ToString()))) 
      { 
       int ReTweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(int.Parse(GridView1.DataKeys[index].Value.ToString())); 
       int tweetID = ReTweetHelper.GetTweetIDFromReTweetByReTweetID(ReTweetID); 
       ReTweetHelper.ReTweet(tweetID, userId); 
      } 
      else 
       ReTweetHelper.ReTweet(int.Parse(GridView1.DataKeys[index].Value.ToString()), userId); 
     } 
     if (e.CommandName == "UnReTweet") 
     { 
      int index = Convert.ToInt32(e.CommandArgument); 
      int RetweetID = ReTweetHelper.GetReTweetIdFromReTweetByUserIdAndTweetId(int.Parse(GridView1.DataKeys[index].Value.ToString()), userId); 
      int TweetID = NewTweetHelper.GetTweetIdFromTweetByReTweetId(RetweetID); 
      ReTweetHelper.RemoveReTweet(RetweetID); 
      NewTweetHelper.GeneralRemoveTweet(TweetID); 
     } 
     if (e.CommandName == "Redirect") 
     { 
      int index = Convert.ToInt32(e.CommandArgument); 
      int TweetID = int.Parse(GridView1.DataKeys[index].Value.ToString()); 
      if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(TweetID)) 
      { 
       int ReTweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(TweetID); 
       int RealTweetID = ReTweetHelper.GetTweetIDFromReTweetByReTweetID(ReTweetID); 
       int UserID = NewTweetHelper.GetUserIdFromTweetByTweetId(RealTweetID); 
       Response.Redirect("ProfilePage.aspx?UserName=" + UserHelper.GetUserName(UserID)); 
      } 
      else 
       Response.Redirect("ProfilePage.aspx?UserName=" + UserHelper.GetUserName(NewTweetHelper.GetUserIdFromTweetByTweetId(TweetID))); 
     } 
    } 
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
    { 
     GridView1.EditIndex = e.NewEditIndex; 
     GridView1.DataBind(); 
     //TextBox TextBox = GridView1.Rows[e.NewEditIndex].FindControl("TweetTB") as TextBox; 
     //HiddenField TweetID = GridView1.Rows[e.NewEditIndex].FindControl("TweetID") as HiddenField; 
     //TextBox.Text = NewTweetHelper.GetTweetFromTweetByTweetId(int.Parse(TweetID.Value.ToString())).TweetText; 
    } 
    protected void GridView1_Cancel(object sender, GridViewCancelEditEventArgs e) 
    { 
     GridView1.EditIndex = -1; 
     GridView1.DataBind(); 
    } 
    public void BindGridview() 
    { 
     int userId = int.Parse(Session["UserID"].ToString()); 
     ServiceReference1.WebServiceSoapClient objWs = new ServiceReference1.WebServiceSoapClient(); 
     DataSet ds = objWs.SelectTweets(userId, 0); 
     DataTable dt = ds.Tables[0]; 
     GridView1.DataSource = dt; 
     GridView1.DataBind(); 
    } 
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e) 
    { 
     int userId = int.Parse(Session["UserID"].ToString()); 
     int index = Convert.ToInt32(e.RowIndex); 
     if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(int.Parse(GridView1.DataKeys[index].Value.ToString()))) 
     { 
      int RetweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(int.Parse(GridView1.DataKeys[index].Value.ToString())); 
      ReTweetHelper.RemoveReTweet(RetweetID); 
      NewTweetHelper.GeneralRemoveTweet(int.Parse(GridView1.DataKeys[index].Value.ToString())); 
     } 
     else 
      NewTweetHelper.GeneralRemoveTweet(Convert.ToInt32(GridView1.DataKeys[index].Value.ToString())); 
    } 
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     int userId = int.Parse(Session["UserID"].ToString()); 
     if (e.Row.RowType == DataControlRowType.DataRow) 
     { 
      HiddenField userIdLbl = (HiddenField)e.Row.FindControl("UserID"); 
      HiddenField tweetid = (HiddenField)e.Row.FindControl("TweetID"); 

      LinkButton editBt = (LinkButton)e.Row.FindControl("Edit"); 
      editBt.Visible = userId == Convert.ToInt32(userIdLbl.Value); 

      ImageButton ProfileImage = e.Row.FindControl("ProfileImage") as ImageButton; 
      ProfileImage.ImageUrl = "~/UploadedImages/" + UserHelper.GetImageUrl(int.Parse(userIdLbl.Value.ToString())); 

      // if retweet 
      if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(int.Parse(tweetid.Value.ToString()))) 
      { 
       Tweet tweet = NewTweetHelper.GetTweetFromTweetByTweetId(int.Parse(tweetid.Value.ToString())); 
       string FullName = UserHelper.GetName(tweet.UserID); 
       // change tweet 
       Label name = e.Row.FindControl("FullNameLabel") as Label; 
       Label UserName = e.Row.FindControl("UserNameLabel") as Label; 
       int ReTweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(int.Parse(tweetid.Value.ToString())); 
       int RealTweetID = ReTweetHelper.GetTweetIDFromReTweetByReTweetID(ReTweetID); 
       int RealUserID = NewTweetHelper.GetUserIdFromTweetByTweetId(RealTweetID); 
       name.Text = "Retweeted by " + FullName + "<br>" + UserHelper.GetName(RealUserID); 
       UserName.Text = UserHelper.GetUserName(RealUserID); 
       ProfileImage.ImageUrl = "~/UploadedImages/" + UserHelper.GetImageUrl(RealUserID); 
       editBt.Visible = false; 
      } 

      //if there is image 
      Image img = (Image)e.Row.FindControl("TweetPic"); 
      img.Visible = img.ImageUrl != "~/UploadedImages/"; 

      //stats 
      Label LikeStat = e.Row.FindControl("LikeStat") as Label; 
      Label ReTweetStat = e.Row.FindControl("ReTweetStat") as Label; 
      if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(int.Parse(tweetid.Value.ToString()))) 
      { 
       int ReTweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(int.Parse(tweetid.Value.ToString())); 
       int RealTweetID = ReTweetHelper.GetTweetIDFromReTweetByReTweetID(ReTweetID); 
       LikeStat.Text = LikeHelper.AmountOfLikesByTweetId(RealTweetID).ToString(); 
       if (int.Parse(LikeStat.Text.ToString()) > 0) 
        LikeStat.Visible = true; 
       ReTweetStat.Text = ReTweetHelper.AmountOfReTweets(RealTweetID).ToString(); 
       if (int.Parse(ReTweetStat.Text.ToString()) > 0) 
        ReTweetStat.Visible = true; 
      } 
      else 
      { 
       LikeStat.Text = LikeHelper.AmountOfLikesByTweetId(int.Parse(tweetid.Value.ToString())).ToString(); 
       if (int.Parse(LikeStat.Text.ToString()) > 0) 
        LikeStat.Visible = true; 
       ReTweetStat.Text = ReTweetHelper.AmountOfReTweets(int.Parse(tweetid.Value.ToString())).ToString(); 
       if (int.Parse(ReTweetStat.Text.ToString()) > 0) 
        ReTweetStat.Visible = true; 
      } 

      // retweeted 
      if (ReTweetHelper.IsReTweetExistByUserIdAndTweetId(userId,int.Parse(tweetid.Value.ToString()))) 
      { 
       ImageButton Retweet = e.Row.FindControl("ReTweetImgBTN") as ImageButton; 
       Retweet.ImageUrl = "~/SrcImage/retweet-action-on.png"; 
       Retweet.CommandName = "UnReTweet"; 
      } 
      if (NewTweetHelper.IsTweetByUser(int.Parse(tweetid.Value.ToString()), userId)) 
      { 
       ImageButton Retweet = e.Row.FindControl("ReTweetImgBTN") as ImageButton; 
       Retweet.ImageUrl = "~/SrcImage/retweet-action-inactive.png"; 
       Retweet.CommandName = null; 
      } 

      //Like Button 
      ImageButton LikeImg = e.Row.FindControl("LikeImgBTN") as ImageButton; 
      if (NewTweetHelper.IsTweetReTweetFromTweetByTweetId(int.Parse(tweetid.Value.ToString()))) 
      { 
       int ReTweetID = NewTweetHelper.GetReTweetIDFromTweetByTweetID(int.Parse(tweetid.Value.ToString())); 
       int RealTweetID = ReTweetHelper.GetTweetIDFromReTweetByReTweetID(ReTweetID); 
       if(LikeHelper.IsUserLikeTweet(userId,RealTweetID))  
        LikeImg.ImageUrl = "~/SrcImage/like-action-on.png"; 
      } 
      else 
      { 
       if (LikeHelper.IsUserLikeTweet(userId,int.Parse(tweetid.Value.ToString()))) 
        LikeImg.ImageUrl = "~/SrcImage/like-action-on.png"; 

      } 

      //Hyper Link Text 

      Label TweetLabel = (Label)e.Row.FindControl("TweetLabel"); 
      //TextBox TweetTB = (TextBox)e.Row.FindControl("TweetTB"); 
      Tweet TweetText = NewTweetHelper.GetTweetFromTweetByTweetId(int.Parse(tweetid.Value.ToString())); 
      //TweetTB.Text = "a";// TweetText.TweetText.ToString(); 
      string text = NewTweetHelper.HyperLinkTweet(int.Parse(tweetid.Value.ToString())); 
      //TweetText.TweetText= text; //need? 
      TweetLabel.Text = text; 

      //Change Tb in edit cand do it in RowEditting 
      //if (e.Row.RowState == DataControlRowState.Edit) 
      //{ 
      // TextBox TextBox = e.Row.FindControl("TweetTB") as TextBox; 
      // Tweet Text = NewTweetHelper.GetTweetFromTweetByTweetId(int.Parse(tweetid.Value.ToString())); 
      // TextBox.Text = "abc"; 
      //} 

     } 
    } 
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e) 
    { 
     HiddenField TweetID = GridView1.Rows[e.RowIndex].FindControl("TweetID") as HiddenField; 
     TextBox TweetText = GridView1.Rows[e.RowIndex].FindControl("TweetTB") as TextBox; 
     NewTweetHelper.UpdateTweet(int.Parse(TweetID.Value), TweetText.Text); 
     GridView1.EditIndex = -1; 
     BindGridview(); 
    } 

Answer 1

, 당신은 EditIndex 값을 설정할 수 있습니다와의 GridView에 데이터를 다시 바인딩 :

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e) 
{ 
    GridView1.EditIndex = e.NewEditIndex; 
    BindGridView(); 
} 

protected void GridView1_Cancel(object sender, GridViewCancelEditEventArgs e) 
{ 
    GridView1.EditIndex = -1; 
    BindGridView(); 
} 

그런 다음 RowDataBound 이벤트에서 행의 컨트롤에 액세스 할 수 있습니다.

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) 
{ 
    if (e.Row.RowIndex == GridView1.EditIndex) 
    { 
     TextBox txtBox = e.Row.FindControl("TweetTB") as TextBox; 
     ... 
    } 
    else 
    { 
     ... 
    } 
}