How to read data from RadGrid?

Hello,

While working on RadGrid, I was in need of real data bind to Grid. I was able to access text of GridViewItem using (gridItem("col1").Text) but if text is formatted, then only you can see is the formatted data.

To see the exact data bind to Grid, use the DataItem property as shown below:

Private Sub RadGrid1_ItemDataBound(sender As Object, e As GridItemEventArgs) Handles RadGrid1.ItemDataBound

    Dim gridItem As GridDataItem = CType(e.Item, GridDataItem)
    Dim data as String = DirectCast(gridItem.DataItem, System.Data.DataRowView).Row.ItemArray(0)

End Sub


HTH

SQL Date Comparison

select case when '2014-07-23 19:00:00' = 'Jul 23 2014 7:00PM' then 1 else 0 end
-- This is string to string comparison

Result will be 0



select case when CAST('2014-07-23 19:00:00' AS DATETIME ) = 'Jul 23 2014 7:00PM' then 1 else 0 end
-- This is datetime to implicit datetime comparison

Result will be 1


select case when '2014-07-23 19:00:00' = CAST('Jul 23 2014 7:00PM' AS DATETIME) then 1 else 0 end
-- This is implicit datetime to datetime comparison

Result will be 1

Hide / Show Custom Errors in Asp.net

If you are seeing "Runtime Error" in your asp.net page and would like to see detail and actual line where the error is happening, this is what we need to do:

In Web.config file, look for tag "customErrors" tag and set the value as:


<customErrors mode="On" />        THIS WILL HIDE ERROR AND SHOW RUNTIME MESSAGE
<customErrors mode="Off" />        THIS WILL SHOW REAL MESSAGE


HTH

Install Assembly in GAC

How to install assembly in GAC?

The very simple way would be to use command prompt. Sounds difficult but it's not.

To have Gacutil installed, either need some version of Windows SDK or
if you cannot install SDK, then copy following 3 files from the machine where Visual Studio or SDK is already installed. I copied them from  C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\NETFX 4.0 Tools

The files are:

• gacutil.exe
• gacutil.exe.config
• 1033\gacutlrc.dll     (can be placed in the same dir as gacutil.exe on the server)

Then go to cmd and get your directory set where gacutil.exe is placed.
Run following:

 gacutil.exe -I <dllfilename>     to install the DLLs in the GAC.


Assembly Locations:
For FW 2.0, its C:\Windows\assembly

For FW 4.0, its C:\Windows\Microsoft.NET\assembly\

In folder above, you can look in 32 or 64 or MSIL folder.
 

How to pass NULL to SelectParameters in SQLDatasource?

Here is the problem
 
How to pass NULL to SelectParameters in SQLDatasource from .aspx or codebehind file?
 
.aspx Method

Two things:
1. First set the SqlDataSource Property CancelSelectOnNullParameter = false
2. Second set the parameter property ConvertEmptyStringToNull="true"
 
Example:

<asp:SqlDataSource ID="ds1" runat="server" ConnectionString='<%$ ConnectionStrings:dbConnString %> 'SelectCommand="someSelect @param1=@param1" CancelSelectOnNullParameter="false">

<SelectParameters>

<asp:Parameter Name="param1" Type="String"  ConvertEmptyStringToNull="true" />

</SelectParameters>

</asp:SqlDataSource>

-------------------------------------------------------------------------------------------------------------------

Codebehind Method

To pass from codebehind, the parameter need to be set in the proper event of Datasource.
Also no other properties of parameter need to set in aspx. Just declare a parameter.
In example below, I am passing null during "Select" call, so the code will look as:

Protected Sub SqlDataSource1_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles SqlDataSource1.Selecting
        If e.Command.Parameters("@param1").Value = "" Then
            e.Command.Parameters("@param1").Value = System.DBNull.Value
        End If    
End Sub


HTH
 

Replace Single Quotes in SQL

You need to use double quotes to represent single quote for SQL to understand:

For instance, to replace single quote with empty space:
(I have colored red for input quotes and non red for replacements for easy reading)

Replace(@string, '''','')

To replace single quote with two single quotes, it would be

Replace(@string,'''','''''')

Just remember, 2 quotes for each single quote, plus opening and closing quotes.

HTH

How to write SQL CLR in VB 2013

Hi,

Its not very obvious to open new project in VS 2013 in VB to find option for SQL CLR.
What you need to do is following:

Open VS 2013

Go to New Project

Dialog box will Appear

Expand Other languages and click on SQL Server

Click on SQL Server Database Project and click ok

When the project load, right click on project and click Add new item

Now to change the project in VB, right click on project and go to properties.

Select SQL CLR tab.

There you will see Language option.

Change it to Visual Basic.

Now right click on project and click Add new item

Now you this time you will see SQL CLR VB in left menu.

Select it and then add desired file according to need to build Store procedure or function.

Happy coding!