Forms Data Controls :: Determine Whether The Table Is Not Empty?
Jul 18, 2010How to determine whether the table is not empty?
Using reader
How to determine whether the table is not empty?
Using reader
i designed a gridiview, within that ItemTemplate i drew an table then tr then some of td's, now the problem is after every row im getting one empty row. below is my code
<ItemTemplate>
<table cellspacing="0" cellpadding="0" style="border-right:1px solid Black;" >
<tr >
<td width="1%" align="center" style="border-right:1px solid Black;">
<span style="">
<asp:ImageButton ImageUrl="~/inc/img/img1.gif" runat="server"
CommandName="Expand" Style="display: none" Width="11px" />
</span>
</td>
<td width="5%" style="border-right:1px solid Black;" > <%--onclick="ShowMenu( <%# Container.DataItemIndex + 1 %>);--%>
<asp:Label runat="server" Text='<%# Eval("data1")%>'></asp:Label> </td>
<td width="5%" >
<asp:Label runat="server" Text='<%# Eval("data2")%>'></asp:Label>
</td>
</tr>
</table>
How to display empty GridView to insert new record if no data retreived for some record on the result from data table?Actually i am trying to give a user an option to add recrod from Gridview. On result of some query it is perfectly displaying data and a footer row with the insertion textbox but when there is no data in the gridview it is not displaying. It should display with footer having insert textbox.
View 5 Repliesi have a some Records in My Data table. i want to get Distinct Records so i have used data View for That. when i look in into DataTable.DefaultView it Shows Empty.
i have Cleared the RowFilter of this Default View.
I have a gridview with two bound fields. On clicking a button i want to display the values in first row of gridview in two textboxes. But if gridview cell is empty i am getting the text in textbox to which the value of cell is given as -' 'i know my problem will be solved if i use the template fields instead. But i want a solution while maintaining the bound fields ,if any.
View 2 RepliesWhen I click on the Alphabets it will show the details of a player...however, when that particular letters has no details of the player..I want to show."No results can be found"..Is there anyway to do it?
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState["CurrentAlphabet"] = "ALL";
this.GenerateAlphabets();
[code]...
I am dynamically creating a table that contains a textbox in each cell. The table is put in a placeholder control. Everything displays perfectly. The problem is when I go to retrieve the values entered in the cells. I have the code to generate the table in a separate method called CreateTable(). In order for my program to find a table in the placeholder when I go to save, I have to run CreateTable() in a postback event AND in the PageLoad event. If I call CreateTable() in only one of those places and I try to save, it says the placeholder is empty and, therefore, I cannot save the textbox contents. I've tried calling CreateTable() from InitLoad but that doesn't work because it needs to reference values from three static controls: 1 dropdown, 1 listbox, and 1 calendar control, which I don't believe have had their viewstate rendered yet.
View 1 RepliesI have a Procedure which should return only 1 Record on selecting record according to Priority.
BEGIN
DECLARE @Accounts nvarchar(MAX)
SELECT @Accounts = ISNULL([map_user_modules].[Accounts], '') FROM [map_user_modules]
WHERE [map_user_modules].[id_user] = 231 AND [map_user_modules].[id_module] = 5
IF ((@Accounts = '') OR (@Accounts = 'All'))
SELECT @Accounts = null
BEGIN
Select @@ROWCOUNT as Priority2
END
IF @@ROWCOUNT = 1
BEGIN
Return
END
BEGIN
Select @@ROWCOUNT as Priority3
END
IF @@ROWCOUNT = 1
BEGIN
Return
END
BEGIN
Select @@ROWCOUNT as Priority4
END
IF @@ROWCOUNT = 1
BEGIN
Return
END
In the above statement Suppose we take a scenario where Select @@ROWCOUNT as Priority3 is executed, I get two tables returned, One is the Table returned by Select @@ROWCOUNT as Priority3 and the other is the Table returned by Select @@ROWCOUNT as Priority2 which has no Records. How can I eliminate the Empty table that returns no records.
I am trying to populate a gridview using two tables. I also have a strongly typed dataset and used the method on this page: [URL] the problem is that, when i try to use two table the gridview does show up (I checked through debugging that the datatable comes back as empty).
View 2 RepliesI want to be able to get the values of the boundfields on data controls such as Details View at runtime. I'm debuggong a project and stepping through the fields of a details view. I have a template field that's using the Text='<%# Bind("LastName") %>' syntax. What is the best way to monitor the values in this situation? Should I use "Add watch"? Is there a better way?
View 3 RepliesI am creating a WebApp and got stuck on the "Save" process. I am gathering data from a SQL DB and using a DataReader to populate the DataList. The DataList hold employee data and there are quite a few. What is the best way to save the data to the database?
I had originally thought that once a Supervisor has verified the employee data, just click the "Update" button and save to the DB but how would I determine which fields in the DataList have been changed? I only want the changes saved.
use a Dataset to populate the DataList then build a second Dataset with the same structure and compare the two. Then save the changes to the DB. I had read before on the 4GuysFromRolla website that using Datasets in a web app wasn't the greatest ...
I have a gridview with a template filed which contains an embedded gridview, which may or may not contain any records. I want to be able to make the master gridview row a different color for those rows whose child gridview has records. My plan is to add a sqldatasource to the page that targets the child gridview table and during the master gridview RowDataBound event I would check to see if there are any records and apply the formatting accordingly.
View 3 RepliesI am using the ItemDataBound event of a ListView to attach data for the different kind of templates I am using. Well, actually, want to use - I have not yet figured out how to know which template is coming in in the ItemDataBound event. I want to figure out if it is the edititemtemplate, insertitemplate, itemtemplate, etc. All these templates have different controls (edit and insert are the same though) and I need to set the controls contained in them.
View 3 RepliesI have wired an event to handle delete command for my GridView. But I cannot determine which the record's unique key, in my case stored in DOCIDNO field. All I get is a row index, such as 0, 1, 2 which obviously cannot be used to accurately delete a record from database.
<asp:GridView
ID="gridTimeOff"
runat="server"
HeaderStyle-CssClass="gridHead"
RowStyle-CssClass="gridRow"
[Code].....
Anyone know how to determine which ImageButton was clicked in a gridview when there are multiple Imagebuttons in a row. I am guessing it's gotta be done in SelectedIndexChanged.
View 4 Repliesdynamic SQL determine if Table exist?
View 1 RepliesI have a textbox named txtOrderDate on my web page. I have a VB.net subroutine that saves various textboxes from my web page to my SQL table using a stored procedure. If a valid date is entered into txtDate, then my save works correctly. I have a column named OrderDate in my table. This is the column I am saving txtOrderDate to. OrderDate is defined as a date column and null is allowed.
But if txtorderDate is blank, my subroutine bombs saying cannot convert string to date. I tried various things like making the value of txtDate = DBNull.value if blank but nothing works. Seems like there would be an easy way to do this.
how can we determine the exactly datagrids row and column that exists a button that has been pushed?
Protected
Sub ela(ByVal
sender As
Object,
ByVal e
As
System.Web.UI.WebControls.DataGridCommandEventArgs)
' Dim id As Integer = datagrid1.DataKeys(CInt(e.Item.ItemIndex))
Dim id
As
Integer = e.Item.Cells.GetCellIndex
Response.Write(ID)
End
Sub
but how exactly we determine the row and the column?
I am trying to determine if the user selected a checkbox for each row in a ListView after hitting a submit button. If so, I need to get the record ID and one other piece of information from that row to insert their selection into a table. I would use a GridView but the questions must be grouped by their categories with the category names displayed followed by their corresponding questions (from what I've read ListView makes this easier).
I tried the code in this forum posting
[URL]
The problem I am encountering so far is that it keeps returning null even if the Checkbox is checked.
Here is my code:
foreach (ListViewDataItem lvi in lvQuestions.Items)
{
// Find the checkbox in each row
CheckBox cb = (CheckBox)lvQuestions.FindControl("cbQuestion");
// If the checkbox is ticked
[Code]....
I have a table on my web form that I need to populate at runtime. I can do this ok and add controls to it, and all works well. However in between each row in the table I am trying to insert an empty row using the following:
[Code]....
[Code]....
NOTE: The litEmpty.Text in code is assigned the non-breaking space character
Anyway when the table is created and displayed, the empty row is not displayed.
In my application I've allowed users to upload Excel 2003 .xls files, and import them into a Gridview. This has been working fine using the following connection string:
[Code]....
Now my users are using Excel 2003, 2007 or 2010, I need to allow the newer file extensions (.XLSX) to be accessible too.
Therefore, within the connection string above I presume I could change the Excel version from 8.0 to 9.0 or 10.0 respectively, but is there much difference between Excel 2007 and Excel 2010 files?
If so, is it possible to 'detect' the Excel file version so that I can use the appropriate connection string to read the data from the files?
I have an application that I would like to be able to allow the user to modify multiple characteristics of each record within a datagrid.
Most characteristics require data to be entered in a text box but some a check box would be more appropriate.
My question is does a gridview column need to have all the same item template controls? or could I read from the database the control type and dynamically alter the template control for each row as it loads?
I have a table thats created dynamically, the table gets its contents from a custom class I've created that gets statistical data from a database. As the table is generated dynamically, I've put the contents class (the table data) into a session object and I populate the table initially inside a !IsPostback then on the page init I get the data from the session (its empty on the firts page load). I am now getting this error: Multiple controls with the same ID 'controlnamehere' were found. FindControl requires that controls have unique IDs. How can I avoid this?
View 4 RepliesI have a listview control bound to an SqlDataSource. As part of the formatting I want to add a title to the data returned from my database. For instance if the data base returns a phone number I want to add 'Tel.' first. However I do not want to diplay this
title if the datafield is empty. Here is what I have done so far.
<ItemTemplate>
<asp:Label ID="BusinessLabel" runat="server" Text='<%# "Tel. "+Eval("Business") %>' CssClass="TeleStyle" />
Or This:Tel.
<asp:Label ID="BusinessLabel" runat="server" Text='<%# Eval("Business") %>' CssClass="TeleStyle" />
</ItemTemplate>
Business is a phone number. If the data field contains a number I get: Tel. 1234 123456. If the field is empty I get Tel. If Business is null I want nothing dsplayed, how do I do this?
I would like to find controls in the detailsview control placed in the EmptyData Template of the gridview. I am trying to create Insert new record for the gridview control.
1. If there are existing records in the table - works fine and sets my two values: I placed Detailsview and Insert Button in the footer of the gridview. I needed to set the values of two fields. When I click on the Insert button it saves new record and sets the field with the value (code attached - works fine). I also have a popup extender that opens detailsview - this works just fine.
2, If ther are not records in the table - saves record but cannot find and set controls on the detailsview Same thing setup in the EmptyData Template. The record is saved but I cannot Find and set the field value on the control.
1. Link button (on click) in the gridview footer (works fine)
protected void LinkButton1_Click1(object sender, EventArgs e)
{
string zupa1;
zupa1 = ddlSelectEmployee.SelectedValue;
try
{
DetailsView zupa = (DetailsView)gvTraining4.FooterRow.FindControl("DetailsView1"); TextBox zupa2 = (TextBox) zupa.FindControl("txtInsertEmployee");
zupa2.Text = zupa1;
}
catch
{
}
DetailsView dettraining = (DetailsView)gvTraining4.FooterRow.FindControl("DetailsView1");
TextBox training = (TextBox) dettraining.FindControl("txtTrainingType");
training.Text = "4";
}
2. EmptyDataTemplate.FindControl - can save record but cannot access txtInsertEmployee and txtTrainingType
DetailsView zupa = (DetailsView)gvTraining4.EmptyDataTemplate.FindControl("DetailsView1");TextBox
zupa2 = (TextBox)zupa.FindControl("txtInsertEmployee");TextBox
training = (TextBox)dettraining.FindControl("txtTrainingType");"4";