Forms Data Controls :: Load Gridview With A Button?
Dec 20, 2010
Is there a way to load a gridview with a button rather than on page load?
Right now I'm trying by making enabled = false and visibile = false and then changing them via c# on the button_click event but its not working out. I get the error:
Data keys must be specified on GridView 'GridView1' before the selected data keys can be retrieved. Use the DataKeyNames property to specify data keys.
The gridview is dependent on several dropdown boxes which is why it shouldnt load until the button is pressed.
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Nov 27, 2010
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Sep 23, 2010
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Jun 14, 2010
i have a detailsview and if the tick box field "controlled" = true then I want the edit button to be hidden.
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Jun 4, 2010
how to call LoadDynamicControl() when btnPopUp was click?
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
//..........
}
LoadDynamicControl(); // if i don't call this function here,i cannot find control to update,but if i call it here. It's will fire with any event.
}
protected void btnPopUP_Click(object sender, EventArgs e)
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Mar 11, 2010
I have Dropdown for Quotenumber(auto increment ).i have created a function to retreive the data from database.data loading into dropdown. when i click on Addquotenumer button the new quotenumber generated and same loading into dropdown but 2 set of Quotenumbers are displaying rather than singleset, i debudded the code the reason was i have called this function twice one is form load and another one in AddQuotenumber button event,both should manadetory as per my requirement. how can un load this dropdown before AddQuotenumber button
Function to retreive data to dropdown
Public Sub retriveDataToDropDown()
Try
Dim connectionString As String = "Database=fabdb;" & "Data Source=localhost;" & "User Id=root;Password=pacvision"
Dim query As String = "SELECT QuoteNumber FROM quotes"
Dim connection As New MySqlConnection(connectionString)
Dim da As New MySqlDataAdapter(query, connection)
Dim ds As New DataSet()
If da.Fill(ds) Then
DDQuote.DataSource = ds.Tables(0)
DDQuote.DataTextField = "QuoteNumber"
DDQuote.DataBind()
'DDQuote.Items.Insert(0, New ListItem("Select", "Default value"))
End If
connection.Close()
Catch ex As Exception
'Console.WriteLine(ex.Message)
End Try
End Sub
AddquoteNumber button code
Protected Sub btnAQ_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnAQ.Click
Dim connectionString As String = "Database=fabdb;" & "Data Source=localhost;" & "User Id=root;Password=pacvision"
Dim rowsEffected As Integer = 0
Dim Query As String = ""
Dim connection As New MySqlConnection(connectionString)
'Dim cmd As New MySqlCommand(Query, connection)
connection.Open()
Query = "insert into Quotes(query follows...................)
retriveDataToDropDown()
retriveDataToDataGrid()
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Jan 4, 2010
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Apr 5, 2010
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
The above error occurs with gridview control , when used with template field columns with item template / and edit templates etc.
updating a row within gridview, at the time of loadiong it loads perfectly fined, but when tried to modify an existing row within gridview control, then it produces the error. Make sure the grid view control has to be a child control which manages the child table info with in a master form. to reproduce the above problem the grid view must be loading the child records info of a master within the masterform, meaning both master data and gridview data all to be managed in one single form.
I had to replace gridview control with datagrid and then it worked perfectly fine. I wasted almost 4 days of my time., there is no way we could figure out the problem. here is the full info of the problem.
Server Error in '/' Application.
Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
Description: 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: Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
Source Error:
[Code]....
Stack Trace:
[HttpException (0x80004005): Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.] System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +306 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Page.LoadAllState() +312 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082
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[Code]....
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[code...
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Default.aspx
[Code]....
[Partial] Default.aspx.cs
[Code]....
[Partial] ImageHandler.ashx
[Code]....
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Here's my code:
[Code]....
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Jan 29, 2010
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[Code]....
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ASP.NET Code
[Code]....
VB Codebehind
[Code]....
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