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Knowing which version of MS Office is installed on the client computer is vital. Many a programmer sees this as an afterthought. This article will show you 4 different. 1 JING Yong-liang;LIU Ya-rong;GAO Yong-bin;Tianshui Power Supply Company;;Influence of Electrical Test Method on Flashover Characteristic of Insulators[J];China Electric. This paper takes the decelerator installed in the aeroengine(p=507 kW,n1 = 41 350r/min)as example,described briefly the basic principle, method,test programming of the.
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How to Determine Which Office Version is Installed with VB. NET and C#Introduction. Knowing which version of MS Office is installed on the client computer is vital.
Many a programmer sees this as an afterthought, sadly. This happens because not enough research of the client's needs and abilities was done. This article will show you 4 different ways to determine the Office versions installed. Design. Create a new project in either VB. NET or C#. You can name it something descriptive. Add. buttons to your form, and leave all the default names.
You can however change the Text Properties of the buttons, as follows. Our Design. Coding. There are numerous ways and tools at our disposal. We can use Late Binding, Assembly and even the Registry. Let us have a closer look. Method 1 - Create. Object / Create. Instance.
Add the following code: VB. NETPrivate Sub Determine_Office. Version_1(). Dim obj. EApp As Excel. Application 'Excel Object.
Dim str. EVersion As String 'Identify Version. EApp = Direct. Cast(Create. Object("Excel. Application"), Excel. Application) 'Cast To Excel App. Select Case obj. EApp. Version 'Determine Version.
Case "7. 0". str. EVersion = "9. 5". Case "8. 0". str.
EVersion = "9. 7". Case "9. 0". str. EVersion = "2. 00. Case "1. 0. 0". str. EVersion = "2. 00. Case "1. 1. 0". str. EVersion = "2. 00.
Case "1. 2. 0". str. EVersion = "2. 00. Case "1. 4. 0". str. EVersion = "2. 01. End Select. Message. Box. Show("Excel Version: " & str. EVersion) 'Display Result.
EApp. Quit() 'Quit. EApp = Nothing 'Release Memory. End Sub. C#private void Determine_Office. Version_1(). //Create.
Object Not Present In C#. EApp = Activator. Create. Instance(Type. Get. Type. From. Prog. ID("Excel. Application")); //Excel object. EVersion = null; //To identify version. Switch doesn't work on dynamic.
EApp. Version == "7. EVersion = "9. 5". EApp. Version == "8.
EVersion = "9. 7". EApp. Version == "9. EVersion = "2. 00.
EApp. Version == "1. EVersion = "2. 00. EApp. Version == "1. EVersion = "2. 00. EApp. Version == "1. EVersion = "2. 00. EApp. Version == "1.
EVersion = "2. 01. Message. Box. Show("Excel Version: " + str. EVersion). obj. EApp. Quit(). //quit. obj. EApp = null. Remember I spoke about. Late Binding. ? Have a read through. Before we can run this, we need to add a.
Reference. to the Excel object library. Click Project, Add Reference.. Select the COM tab and select your Excel version. Add the following Imports / Usings above your class name. VB. NETImports Microsoft. Office. Interop. C#using Microsoft. Office. Interop; This allows us to make use of Office from within our code.
Our code instantiates an Excel object, then we determine its version. Based on that, we display the appropriate message. The C# code does not make use of. Create. Object. , as that is not available in C#. The nearest equivalent in C# is. Activator. Create.
Instance. . This basically achieves the same thing as. Create. Object. . Because we do not know what will be returned by. Create. Instance. Excel object variable. The C# equivalent of Select case is switch. We cannot use switch here, because the data is.
Boolean or character data type. Hence, the If statements. Method 2 - The Registry. Add the following code: Private Sub Determine_Office. Version_2(). Dim str.
EVersion. Sub. Key As String = "\Excel. Application\Cur. Ver" '/HKEY_CLASSES_ROOT/Excel. Application/Curver.
Dim str. Value As String 'Value Present In Above Key. Dim str. Version As String 'Determines Excel Version. Dim rk. Version As Registry. Key = Nothing 'Registry Key To Determine Excel Version. Version = Registry. Classes. Root. Open.
Sub. Key(name: =str. EVersion. Sub. Key, writable: =False) 'Open Registry Key. If Not rk. Version Is Nothing Then 'If Key Exists. Value = rk. Version.
Get. Value(String. Empty) 'get Value. Value = str. Value. Substring(str. Value.
Last. Index. Of(".") + 1) 'Store Value. Select Case str. Value 'Determine Version.
Case "7". str. Version = "9. Case "8". str. Version = "9.
Case "9". str. Version = "2. Case "1. 0". str. Version = "2. 00. Case "1. 1". str. Version = "2. 00.
Case "1. 2". str. Version = "2. 00. Case "1. 4". str. Version = "2. 01. End Select. Message.
Box. Show("Excel " & str. Version & " Installed!") 'Display Result. End Sub. C#private void Determine_Office.
Version_2(). string str. EVersion. Sub. Key = "\\Excel. Application\\Cur.
Ver"; //HKEY_CLASSES_ROOT/Excel. Application/Curver. Value = null; //Value Present In Above Key. Version = null; //Determines Excel Version. Registry. Key rk.
Version = null; //Registry Key To Determine Excel Version. Version = Registry.
Classes. Root. Open. Sub. Key(str. EVersion. Sub. Key, false); //Open Registry Key. Version != null)) //If Key Exists. Value = (string)rk. Version. Get. Value(string.
Empty); //Get Value. Value = str. Value. Substring(str. Value.
Last. Index. Of(".") + 1); //Store Value. Value) //Determine Version. Version = "9. 5".
Version = "9. 7". Version = "2. 00. Version = "2. 00. Version = "2. 00. Version = "2. 00. Version = "2. 01.
Message. Box. Show("Excel " + str. Version + " Installed!"); //Display Result.
Here, we made use of the. Before we forget, add the Wind. Namespace. VB. NETImports Microsoft. Win. 32 'For registry functions.
C#using Microsoft. Win. 32. OK, I said we made use of the registry, let's pause a bit here. Many people do not know what the registry is, or how to use it. I used to be scared of the registry.
Why? Well, because the registry is the place where all of the settings are saved. It's like an inventory where all of the info about the programs, and the controls are stored. For more info regarding the Registry, have a read through. I wrote a while back. With the above code segment, we explored the. HKEY_CLASSES_ROOT\Excel.
Application\Cur. Ver. This is where the information about Excel is stored. Current Version. Now, we have to get the information out of there and use it to determine our actual comprehensible version. The information is stored like this. Excel. Application. Very few people will know that this actually means Office 2.
Office to be created. With some string manipulation we extract the ". Not too difficult now is it? Method 3 - Type. Add the following sub: VB.
NETPrivate Sub Determine_Office. Version_3(By. Val str. Version As String).
Dim typ. Office As Type = Type. Get. Type. From. Prog. ID(str. Version) '//Gets the type associated with the specified program identifier (Prog. ID). Prog. ID is a valid entry in the registry. Version = str. Version. Substring(str. Version.
Last. Index. Of(".") + 1) 'Get Last 2 Characters in String. Dim str. Temp As String. If Not typ. Office Is Nothing Then 'Do We Have A Value? Select Case str. Version 'Determine Version. Case "7". str. Temp = "9. Case "8". str. Temp = "9.
Case "9". str. Temp = "2. Case "1. 0". str. Temp = "2. 00. 2".
Case "1. 1". str. Temp = "2. 00. 3". Case "1. 2". str. Temp = "2. 00. 7".
Case "1. 4". str. Temp = "2. 01. 0". End Select. Message. Box. Show("Excel " & str. Temp & " Installed") 'Display Result.
End Sub. C#private void Determine_Office. Version_3(string str. Version). Type typ. Office = Type. Get. Type. From. Prog. ID(str. Version); //Gets the type associated with the specified program identifier (Prog. ID). Prog. ID is a valid entry in the registry.
Version = str. Version. Substring(str. Version. Last. Index. Of(".") + 1); //Get Last 2 Characters in String. Temp = null; //Initialize.
Office != null)) //Do We Have A Value? Version) //Determine Version. Temp = "9. 5". break.
Temp = "9. 7". break. Temp = "2. 00. 0". Temp = "2. 00. 2". Temp = "2. 00. 3". Temp = "2. 00. 7". Temp = "2. 01. 0". Message. Box. Show("Excel " + str.
Temp + " Installed"); //Display Result. Many familiar terms in here. What is new is the little word. This gets the type associated with the specified program identifier (. OK, what does this mean?
It means it checks the. Program ID you supply. This. Program ID.
Excel. Application. Method 2. Once we have established that what was supplied was indeed valid, we do some string manipulation again and obtain the version again. Method 4 - Assembly. Add the last sub: VB. NETPrivate Sub Determine_Office. Version_4(). 'Assembly we're looking for.
Dim str. Assembly. Off. 20. 07 As String = "Microsoft. Office. Interop. Excel, Version=1. Culture=neutral, Public. Key. Token=7. 1e.
Try ' Use Try Instead of IF, Because On Error, Program Will Crash. Dim xsl. Excel. Assembly As [Assembly] = [Assembly]. Load(str. Assembly. Off. 20. 07) 'Load Assembly. If Not xsl. Excel. Assembly Is Nothing Then 'If Exists.
Message. Box. Show("Excel 2. Installed") 'Success. End If. Catch ex As Exception. Message. Box. Show("Not Installed") 'Don't Exist. End Try. End Sub. C#private void Determine_Office.
Version_4(). //Assembly we're looking for. Assembly. Off. 20. Microsoft. Office. Interop. Excel, Version=1. Culture=neutral, Public.
Key. Token=7. 1e. Use Try Instead of IF, Because On Error, Program Will Crash. Assembly xsl. Excel. Assembly = Assembly. Load(str. Assembly. Off. 20. 07); //Load Assembly. Excel. Assembly != null)) //If Exists.
Message. Box. Show("Excel 2. Installed"); //Success! Exception ex). Message. Box. Show("Not Installed"); //Don't Exist. Add the Reflection Namespace: VB. NETImports System.
Reflection. C#using System. Reflection; Assembly.
Reflection. namespace. We specify the exact. If the. was successful, we display a message saying that the program we're looking for has been found. If the Load was not successful, an error will be generated. All that is left now is to call these subs from our buttons. Add the next code: VB. NETPrivate Sub Button.
Click(By. Val sender As System. Object, By. Val e As System. Event. Args) Handles Button. Click. Determine_Office. Version_1(). Private Sub Button.
Click(By. Val sender As System. Object, By. Val e As System. Event. Args) Handles Button. Click. Determine_Office.
Version_2(). Private Sub Button. Click(By. Val sender As System. Object, By. Val e As System.
Event. Args) Handles Button. Click. Determine_Office.
Version_3("Excel. Application. 1. 2"). Private Sub Button. Click(By. Val sender As System. Object, By. Val e As System. Event. Args) Handles Button. Click. Determine_Office.
Version_4(). End Sub. C#private void Button.