Forms Data Controls :: Getting Error With GridView And StringBuilder / StringWriter
Jan 27, 2010
I am getting the following error with my GridView using StringBuilder/StringWriter: MyGridView of type 'GridView' must be placed inside a form tag with runat=server.
StringBuilder SB = new StringBuilder();
StringWriter SW = new StringWriter(SB);
HtmlTextWriter htmlTW = new HtmlTextWriter(SW);
MyGridView.RenderControl(htmlTW); //error here
string s = SW.ToString();
I am also using a MasterPage, which I believe has a lot to do with why I am getting this error. Is there a work around?
i am trying to write a gridview to an excell file, but i get the error: The type or namespace name 'StringWriter' could not be found (are you missing a using directive or an assembly reference?)
my code is:
protected void Button1_Click(object sender, EventArgs e) { //Clear content of buffer stream Response.Clear(); //Set the type and filename Response.AddHeader("TITLE", "TITLE.xls"); Response.Charset = "iso-8859-2"; Response.ContentType = "application/vnd.xls"; // Add the HTML from the GridView to a StringWriter to write it out later StringWriter sw = new StringWriter();HtmlTextWriter htw = new HtmlTextWriter(sw); GridView1.RenderControl(htw); //Write out the data Response.Write(sw.ToString()); Response.End(); }
Actually I am wishing to use StringBuilder to Append DataTable as given below:
[Code]....
correct the line sb.Append(dt.Rows[i].Item(k, DataRowVersion.Current).toString()); to eliminate the following error:
'System.Data.DataRow' does not contain a definition for 'Item' and no extension method 'Item' accepting a first argument of the type 'System.Data.DataRow' could be found (are you missing a using directive of an assembly reference?).
I have gridview control that has data binded by using EF. Whenever I try to sort my gridview I get this error: "Input string was not in a correct format." This error points to the following line of code: "int index = Convert.ToInt32(e.CommandArgument);"
AdministracijaVrstaAktivnosti.aspx
[Code]....
AdministracijaVrstaAktivnosti.cs
[Code]....
I'm not sure what do I have to fix if I want to sort the columns.
If I bind the data manually what is the code for codebehind to allow sorting for particular columns.
Im developing a web application in asp.net where i have gridview with some text box controls in it.In runtime we are creating a new row dynamically by clicking add button .To insert data into the database.i used a stringbuilder instead of string becoz the data what i have to insert into database is more.but i am gettin the following error No mapping exists from object type System.Text.StringBuilder to a known managed provider native type. in database the datafield column datatype is varchar(max).
The page for sure displays a TextBox on the browser which is easily accessible through JavaScript...but what i want is the control to be available on the Server Side too...so that when the page is posted back to the server i can easliy obtain the value that has been entered by the user into the textbox.
I have used to code below successfully to export a gridview to an excel spreadsheet, however when i use it for a gridview with data from a different table i receive the following error:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index
The thing is it works locally fine but when i upload to my shared server i receive the error above?
I have a grid view. I had set the autogenerateedit buttion to true. and i wrote the following code
[Code]....
So, When i click the edit button on the grid view, it will show me 'update' and 'cancel' buttons along with text boxes for cells 1 and 2. but when i change the data in those text boxes and click the 'update' button, 'response.write' is sowing me the previous values rather than modified values. How to get the modified values into str1 and str2 ?
i am getting following error on gridview.databind() Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack , ThreadAbortException,it was working fine and suddenly getting error, i don't what's problem is?
I have a gridview and detailsview on the same page. The detailsview is defaultmode="insert" and works perfectly (Role, Site and Department are all bound to ddls). The gridview displays information fine and deletes fine - but when i click edit it breaks. But i dont understand why as it is using the methods and data sources as the gridview. I did a test run on this a few weeks back and it worked in visual web developer, lost all the data when i formatted the hdd and now - i cant get it to work, but i am sure its exactly the same. error is
DataBinding: 'System.Data.DataRowView' does not contain a property with the nameXXXX.
It does that on each of the ddls for site, role and department. But the property is there! i can see it when i test my SPROCS and they display / work fine in the detailsview.
I'm working with a gridview control to update records in a table. When i try to update any record, i get this error msg that i have to declare a variable wich is already declared.Here is the error Msg:
Must declare the variable '@catUltModificacion'. System.Data.SqlClient.SqlException: Must declare the variable '@catUltModificacion'.
I'm quite new to asp.net. I use MS Visual Studio 2008 and MySQL database. When I try to edit a record via gridview and the generated UPDATE syntax I get an error.I inserted a gridview into my asp.net web application and connected it to my database (all is OK). Then I checked for auto generation of update and other syntax:
[Code]....
When I test in a browser I get a pop window form for editing a record. But when I click "update" I get the following error:"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?, strSkrajsanNaziv = ?, strKraj = ?, strDavcnaSt = ?, SkupinaID = ? WHERE Stran' at line 1"what's wrong with the UPDATE syntax? Is this syntax only valid when using MSSQL?
I have create a grid view with a dropdownlist for one of the columns. This works fine, but when I click edit and then update I get an error saying it cant update due to null value. I'm sure it because the parameter in the update of SqlDataSource1 is not referring to the value select in the edit item template, but I cant figure out how to do this.
I am exporting GridView to Excel but keep on getting a pop up "The file you are trying to open, 'somefile.xls' is in a different format than specidied by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?When I click "yes" the file opens fine. But why I am getting the pop up at the first place.Also as I have Office 2007 on my machine
When I try to change a page on my gridview, I keep getting this error: Index was out of range. Must be non-negative and less than the size of the collection. How can I fix this? The line the error highlights is the one below:
I am want show the MSChart in the Gridview Item Template,When i put the MSChart control in the Gridview Itemtemplate the Gridview does not render rhe MSChart,It says " There was error in rendering the contol,object reference not set to an instance of an object.
I want to give search functionality in grid view. To implement this i am following the below link [URL] but I am getting following error The name 'MSCD' does not exist in the current context Iam using the following code
I m working on application that works similar to our email i.e when user enter his emailid and password his inbox should be display and those unread should be in bold and i have a treeview for inbox, sent, deleted .when inbox is selected the inbox detail should be displayed using gridview by default like in email the inbox data shoul be display on pageload so i have written databind code for grid view in page load event
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Class1 obj = new Class1(); string toid = Context.User.Identity.Name; obj.gridfill(gv, "select * from inbox inner join usermaster on inbox.userid=usermaster.userid where inbox.toid= '" + toid + "'"); string id = Context.User.Identity.Name; lblemaiid.Text = id; Session["inbox"] = "false";.........................................
on my page is a dropdown list and gridview. The gridview is bound to bound to a database using an object data source and has a select parameter (int)which is determined by the item selected in the ddl by the user.
it was working fine but now i have put the ddl in an update panel as i want to avoid the posback. The problem is now the pop up displays but the gridview does not show any data from the database. If I close the window and then try again it does but the first selection. i assume on the first attempt it is not getting the parameter.
I have a gridview with some text-box columns and one dropdownlist-column (Templatefield).
With the dropdownlist i wan't to be able to edit a cell in a row. I have read a lot on the web and i have folowing code. I only get a parameter error now, before i added the dropdownlist everything was ok.
This is my html:
[Code]....
This is my update-command in the class "TransactiesDAO"
[Code]....
Look at the line:
[Code]....
in the aspx code. I don't now what to type in the "Bind(...)" text.
With above i get error: Message=DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'Subrubriek'. when trying to update the row.
When i delete the line "SelectedValue=" then i get folowing error:
It gives me folowing error:
ObjectDataSource 'ObjectDataSource1' could not find a non-generic method 'UpdateTransactie' that has parameters: Rekening, Omschrijving1, Omschrijving2, Boekdatum, BedragBij, BedragAf, Subrubriek, @ID_SR, ID
I have a dynamic gridview which adds row when the button is click. But I am getting an error in the browser. I managed to run this and get it working but after couple of days working, there's a wierd error occur when I click the add row button.
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation
i have agridview in asp.netwich is connected to datatablei edit the culomn added the abelite to delet rowsbut when i press the delete choice i got an errorthe error wich i c istnx The GridView 'GridView1' fired event RowEditing which wasn't handled. escription:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.Web.HttpException: The GridView 'GridView1' fired event RowEditing which wasn't handled.Source Error:
