Forms Data Controls :: Changing In A Gridview All Data Is Lost?
Apr 5, 2010
I have a gridview which i have enabled paging. When i select a page in the footer, the page postbacks, and I lose all data.I am lost on how to enable paging and maintain the data in the table.I manually insertthe information into a datatable then bind because of the way i have to get the information.Here is what I have so far:
[Code]...
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Jan 5, 2011
I have a c# code that put some background color in cells according with some values, the problem is that each time I add a button or a postback occurs I lost all colors (and other attribs).So my workaround in call the function that fills the gridview each time... but this produce a slow performance.
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Feb 2, 2010
im building a simple message messenger web application, i currently have a column in my database dedicated to the status of a message. Its bound to the third column in a datagrid.
After converting the column to a TemplateField and using a Label to fetch the data how do i change the text from the database to a small message, e.g. if the data in the database (as an interger) is 0. how do i change the interger to a string to display "UnRead". Do i need to do this during the databinding call or after the grid has been databound?
I know it would be easier to use a boolean and checkbox control but the interger column represents more values than true or false.
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Mar 3, 2010
In design time I created a Gridview and a delete button in a page test.aspx:
[Code]....
The program stopped at statement "if ((row.Cells[COL_INDEX_SELECTED].Controls[0] as CheckBox).Checked)",
because it cannot find the checkbox created before.
I tried to shift all the code in Page_Load to Page_Init, but the ticked checkboxes are still lost.
I could find the ticked checkboxes names in its request object parameters(this.Request.Params.AllKey) if I setup a breakpoint on the error statement.
Does anyone konw what's happening and how to retrieve the selected rows?
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Dec 16, 2010
I have a rather large gridview that I need to page. the follwoing is my code but when I try to page it gives me a internet lost connection error??? I have not gotten to work in dot.net 4.0 this code is from one of my projects in 1.1 where it works fine but for some reason it is changes for 4.0.
[Code]....
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Sep 10, 2010
I have a gridview control that extends the default gridview. I have added an attribute called "hiddenSelectedValues" to to the gridview during the "PreRender" event and I have a private variable that points to the value of that attribute.
I have some javascript code that modifies the value of this attribute based on the user checking or unchecking checkboxes in the grid. I have confirmed that the javascript is indeed modifying the value of the "hiddenSelectedValues" attribute by using Firebug to see the change as it happens.
However, once a postback occurs, the grid looses the updated value of this attribute and I am unable to reference get the updated value on the server side.
How do I keep the value of an attribute changed by javascript on postback?
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Jul 1, 2010
I have 2 gridviews in an aspx file. The First one is master grid, and the second one is detail grid. (such as Customer and it's Invoices) First, I load data into master grid. I use FireBug and notice that every row has it's row id, such as:
<tr onmouseover="javascript:SetRowColor('ctl00_ContentPlaceHolder1_grdResult_ctl02',0);"
id="ctl00_ContentPlaceHolder1_grdResult_ctl02">
.....
</tr>
Then, in master grid, I select a buttonfiled in a row to load the second gridview.Every thing alright, the second grid has it's row id But The master grid lost all row id that I dont know the reason why?
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Dec 13, 2010
I have a question, I have a gridview that shows a red balloon as imagebutton in one of the cells. Now i want to be able to let a users press the button, write a value in a record in the database and then change the red balloon to a yellow one. When the user wants (at any given time) wants the undo the value again the record should be rewriten again and the yellow ballon should be red again. Any tip is more than welcome :)
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Nov 13, 2010
i have a web page and a gridview in it , i want if one of my fileds (in database) is null , the color of that row change.
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Aug 14, 2010
First off, sorry if this is in the wrong section. I have a gridview that loads from a SQL database. It has three columns, the first being a template column with a checkbox, the second being a name from the database, and the third being a field from the database related to that name. (the third column is empty). I want to be able to click on the check box in each row, and automatically have the third column populate with data that the user can select from a drop down list at the top of the screen or something. I am using VB, and I basically just need a way to make this checkbox, add a value from somewhere into the database. (Also, I know that I can just use Edit in the gridview to change data, but there will be a long list, and that way gets quite time consuming) I hope this makes sense, if not I can try rewording it.
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Sep 15, 2010
I have two Repeater controls, each hosted in a user control. Both user controls are contained in the same aspx page. Only one User Control is visible at any one time. The repeaters are comprised of checkboxes, and text boxes for user input.
The aspx page is configured with an Ajax ScriptManager; and contains several Ajax UpdatePanels. These UpdatePanels result in partial page post backs when text is changed in a textbox control in controls on the aspx page (this is not the behaviour for the Repeaters in the User Controls). Through use of several AsyncPostBackTriggers, various controls contained in the other UpdatePanels on the page have their content refreshed in response to the partial page post backs they are configured be notified about.
Depending on a radio button group selection, I set the visible property to true or false - as appropriate for the User control containing a repeater control. The Repeater control is then populated with data using databinding. All of this works.
However, when the Submit button is clicked, the Repeater control contains no data.
Given that I am not dynamically adding the Controls containing the Repeater controls (but using Visible true / false). I would have thought that the State of the fields and the data in the visible control would be preserved during the post back.
The User Controls are contained within the UpdatePanel that contains the Submit Button.
I have explicitly Enabled View state without any effect.
Am I correct in assuming that I should not have to do any explicit handling of data changes the user makes (via client side script and manipulation of an Data Structure Representing the Repeater Data); and the View State should maintain the data I need to access on the server when submitted?
I do not believe that it is the User Control visible state changes that are causing the issue because when the page is initially loaded on of the User controls is populated with dummy rows (so it displays).
I am suspicious that because the visible state of the controls is changed during partial page post back, that the Page View State ends up with no knowledge of the User Control and therefore cannot track its data (or changes).
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Oct 13, 2010
I have a gridview bound to a SQL Select statement. I want the binding of one of the columns to depend on one of the values in the database record. For example, say I have a SQL table containing FirstName, LastName, ShowFirstName.
I want a the Name column in my Gridview to be bound to FirstName if ShowFirstName is 1, and bound to LastName if ShowFirst Name is 0.
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Apr 27, 2010
I have made a gridview by assigning a sqldatareader object to it to display records....but i want to change the headertext of each column.i dont want the default name stored in the database how do i change the headertext?
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Nov 11, 2010
how i can change the sleected row style in gridview when i click on UP or DOWN buttons
i am using the below code to set the style
<SelectedRowStyle BackColor="Teal" ForeColor="Maroon" Font-Bold="True" />
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Mar 1, 2011
I would like to change color of the gridView depending on the value from table that is bounded to the grid. I actually don't show this value on the grid. I tried by using additional field with visible=false, but the cell is string empty in this way. I don't know how to solve this in some other way?
I used this code, but as I said the value is empty:
[Code]....
Is it possible to solve this by getting value directly from bounded table and not from rows cell?
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Mar 9, 2011
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:
[Code]....
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Feb 27, 2010
I have a gridview which has an image specified for the selectimageurl property.
Can someone advise how I can programatically change the image on a row per row basis?
I would ideally like to only change the image depending on the value of another column within the gridview.
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Jun 24, 2010
I have a gridview where I have TemplateField and I have bind with Coulmn Name. In Run time I would like to change the coulmn name but I am getting error.
[Code]....
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Jun 22, 2010
how can I change a checkboxfield in my Gridview from another class/file, my griedview name is gvUserEntry.
So what all do I need to do if I want to access this from another function
This is my grid view code....
<asp:GridView ID="gvUserEntry" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" BackColor="White" BorderColor="#999999" BorderStyle="Solid"
BorderWidth="1px" CellPadding="3" DataKeyNames="RowId" DataSourceID="SqlDataSource6"
EnableModelValidation="True" ForeColor="Black" GridLines="Vertical">
[Code]....
Nw i want to change the TempPwd checkboxfield from another aspx file namely NewUserLogin.aspx, So is it possible? The idea behind doing this is, as soon as the user enters a new password in the NewUserLogin.aspx page, the checkboxfield in the GridView of CustomerSetup.aspx file should be unset.
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Mar 11, 2010
I'm attempting to bind multiple datasources to a single Gridview. Can someone direct me on how to change the below <%# Bind("") %> programatically in the code behind. For example, change "HRID" to "PayrollID" to account for a different column. the dataSource binds to the Gridview so the Rows will not be created yet.
I know how to accomplish this with a boundField, but I'm having issues with setting the text of the label in the ItemTemplate.
<asp:TemplateField HeaderText="ID">
<ItemTemplate>
<asp:Label ID="lblHR" runat="server" Text='<%# Bind("HRID") %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:Label ID="lblNewID" runat="server" Text=""></asp:Label>
</EditItemTemplate>
</asp:TemplateField>
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Aug 25, 2010
How to change the skin ID of the dynamic controls
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Jun 25, 2010
This is an ASP.NET 3.5 project being created with VS2008. One page contains a gridview with six columns. One of the columns displays standard, 17 character , Vehicle Identification Numbers (VIN). The VIN numbers display normally when the page is rendered. However, when the gridview is exported to Excel, the VIN numbers change. For example, in the gridview, the VIN might be 12345678912345678But when the gridview exports into Excel, that same VIN becomes 1.23457E+16The value of that Excel cell changes to 12345678912345600, changing the last two digits from 78 to 00. It does this for every VIN in the gridview table.I did some Googling but couldn't find anything specifically on this issue. Has anyone seen it before? Is there a way to format the column in the gridview so that Excel will accept it as literal text? I tried programmatically adding a style called 'text' to that column but that had no effect on the outcome. All of the other columns are behaving normally.
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Feb 1, 2010
I have a simple GridView in my page which it bound to Database using Connection String in vb.net.(I am not using SqlDataSouce of Asp.Net)
When it bound to db, I can not change the header text of columns.
Here is the code behind:
[Code]....
I have even used the GridView1.Columns(0).HeaderText = "some text"
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Mar 14, 2014
I can not get the Selected Item value in in GridView Dropdowntemplate Feild
I Get Only First index item text value
string ItemSkuCode = ddlIMEntity.SelectedItem.Text + "-" + txtIMItem.Text + " -";
foreach (GridViewRow tempr in gvParameter.Rows)
{
DropDownList ddl = (DropDownList)tempr.FindControl("ddlParameterValue");
// string str1 = Request.Form[ddl.UniqueID.];
if (ddl.Items.Count > 0)
[CODE]..
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Sep 21, 2010
I have a stored procedure that returns a dataset with a different number of columns and different column names depending on user input. How can I use this with a GridView? Normally I define the columns beforehand in a static fashion, but, have never done a dynamic dataset like this.
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