how to use one of mysql database column as variable with VB.NET
-1
I have this table in my mySQl database:
ID First_Name Second_Name Age RFID_Tag Amount_Serve
--------------------------------------------------------------
1 John Smith 28 hdgdYun8JH Small
2 George Mark 35 kdjfHluhHB Big
and have this code for mysql query
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim str As String = "Server=localhost;Port=3306;Database=namesdb;Uid=root;Pwd=1234"
Using con As New MySqlConnection(str)
Dim query As String = "select * from namedata where rfid_tag=@rfid"
Dim cm As New MySqlCommand(query, con)
con.Open()
cm.Parameters.Add("@rfid", MySqlDbType.VarChar).Value = TextBox3.Text
Dim rd As MySqlDataReader = cm.ExecuteReader()
' Check if any rows exist
If rd.HasRows = True Then
MessageBox.Show("trun on sm")
Else
MessageBox.Show("Not your time")
End If
End Using
End Sub
what I want is when the rfid tag in textbox3.text equal the rfid tag in table I want to use IF function form if that rfid amount serve Small run python script for small and if big run script for Big
What I think is to replayce:
If rd.HasRows = True Then
to be something like this if Amount_server = Small then
I hope I made it clear any help for this case please.
mysql vb.net
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
add a comment |
-1
I have this table in my mySQl database:
ID First_Name Second_Name Age RFID_Tag Amount_Serve
--------------------------------------------------------------
1 John Smith 28 hdgdYun8JH Small
2 George Mark 35 kdjfHluhHB Big
and have this code for mysql query
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim str As String = "Server=localhost;Port=3306;Database=namesdb;Uid=root;Pwd=1234"
Using con As New MySqlConnection(str)
Dim query As String = "select * from namedata where rfid_tag=@rfid"
Dim cm As New MySqlCommand(query, con)
con.Open()
cm.Parameters.Add("@rfid", MySqlDbType.VarChar).Value = TextBox3.Text
Dim rd As MySqlDataReader = cm.ExecuteReader()
' Check if any rows exist
If rd.HasRows = True Then
MessageBox.Show("trun on sm")
Else
MessageBox.Show("Not your time")
End If
End Using
End Sub
what I want is when the rfid tag in textbox3.text equal the rfid tag in table I want to use IF function form if that rfid amount serve Small run python script for small and if big run script for Big
What I think is to replayce:
If rd.HasRows = True Then
to be something like this if Amount_server = Small then
I hope I made it clear any help for this case please.
mysql vb.net
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
Something likerd.GetString(5)orrd["Amount_Serve"].ToString()should be enough to retrieve the data and store it inside a string variable.
– Tetsuya Yamamoto
Nov 16 '18 at 7:46
Thanks a lot for your reply to help but I want to be clear please..for this rd.GetString(5) I have to replace 5 with Amount_serve column name?
– Mohammad Khaled
Nov 16 '18 at 9:55
@Tetsuya I tried this: If [rd.GetString("Amount_Serve") = "small"] Then . I got this error [Additional information: Invalid attempt to access a field before calling Read()]
– Mohammad Khaled
Nov 16 '18 at 10:17
@TetsuyaYamamoto I want it something like this which can take decision upon mount_serve column with compare rfid column (If (rd.Read()) Then rd.GetString("Amount_Serve") = small MessageBox.Show("OK") Else MessageBox.Show("Not your time") End If)
– Mohammad Khaled
Nov 16 '18 at 11:12
Note that what you are after is not a column at all, just a value in a database. Clear questions get more and better answers
– Make StackOverflow Good Again
Nov 16 '18 at 17:16
add a comment |
-1
-1
-1
I have this table in my mySQl database:
ID First_Name Second_Name Age RFID_Tag Amount_Serve
--------------------------------------------------------------
1 John Smith 28 hdgdYun8JH Small
2 George Mark 35 kdjfHluhHB Big
and have this code for mysql query
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim str As String = "Server=localhost;Port=3306;Database=namesdb;Uid=root;Pwd=1234"
Using con As New MySqlConnection(str)
Dim query As String = "select * from namedata where rfid_tag=@rfid"
Dim cm As New MySqlCommand(query, con)
con.Open()
cm.Parameters.Add("@rfid", MySqlDbType.VarChar).Value = TextBox3.Text
Dim rd As MySqlDataReader = cm.ExecuteReader()
' Check if any rows exist
If rd.HasRows = True Then
MessageBox.Show("trun on sm")
Else
MessageBox.Show("Not your time")
End If
End Using
End Sub
what I want is when the rfid tag in textbox3.text equal the rfid tag in table I want to use IF function form if that rfid amount serve Small run python script for small and if big run script for Big
What I think is to replayce:
If rd.HasRows = True Then
to be something like this if Amount_server = Small then
I hope I made it clear any help for this case please.
mysql vb.net
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
I have this table in my mySQl database:
ID First_Name Second_Name Age RFID_Tag Amount_Serve
--------------------------------------------------------------
1 John Smith 28 hdgdYun8JH Small
2 George Mark 35 kdjfHluhHB Big
and have this code for mysql query
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim str As String = "Server=localhost;Port=3306;Database=namesdb;Uid=root;Pwd=1234"
Using con As New MySqlConnection(str)
Dim query As String = "select * from namedata where rfid_tag=@rfid"
Dim cm As New MySqlCommand(query, con)
con.Open()
cm.Parameters.Add("@rfid", MySqlDbType.VarChar).Value = TextBox3.Text
Dim rd As MySqlDataReader = cm.ExecuteReader()
' Check if any rows exist
If rd.HasRows = True Then
MessageBox.Show("trun on sm")
Else
MessageBox.Show("Not your time")
End If
End Using
End Sub
what I want is when the rfid tag in textbox3.text equal the rfid tag in table I want to use IF function form if that rfid amount serve Small run python script for small and if big run script for Big
What I think is to replayce:
If rd.HasRows = True Then
to be something like this if Amount_server = Small then
I hope I made it clear any help for this case please.
mysql vb.net
mysql vb.net
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
edited Nov 16 '18 at 7:51
jmcilhinney
26.5k32033
26.5k32033
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
asked Nov 16 '18 at 7:44
Mohammad KhaledMohammad Khaled
58
58
Something likerd.GetString(5)orrd["Amount_Serve"].ToString()should be enough to retrieve the data and store it inside a string variable.
– Tetsuya Yamamoto
Nov 16 '18 at 7:46
Thanks a lot for your reply to help but I want to be clear please..for this rd.GetString(5) I have to replace 5 with Amount_serve column name?
– Mohammad Khaled
Nov 16 '18 at 9:55
@Tetsuya I tried this: If [rd.GetString("Amount_Serve") = "small"] Then . I got this error [Additional information: Invalid attempt to access a field before calling Read()]
– Mohammad Khaled
Nov 16 '18 at 10:17
@TetsuyaYamamoto I want it something like this which can take decision upon mount_serve column with compare rfid column (If (rd.Read()) Then rd.GetString("Amount_Serve") = small MessageBox.Show("OK") Else MessageBox.Show("Not your time") End If)
– Mohammad Khaled
Nov 16 '18 at 11:12
Note that what you are after is not a column at all, just a value in a database. Clear questions get more and better answers
– Make StackOverflow Good Again
Nov 16 '18 at 17:16
add a comment |
Something likerd.GetString(5)orrd["Amount_Serve"].ToString()should be enough to retrieve the data and store it inside a string variable.
– Tetsuya Yamamoto
Nov 16 '18 at 7:46
Thanks a lot for your reply to help but I want to be clear please..for this rd.GetString(5) I have to replace 5 with Amount_serve column name?
– Mohammad Khaled
Nov 16 '18 at 9:55
@Tetsuya I tried this: If [rd.GetString("Amount_Serve") = "small"] Then . I got this error [Additional information: Invalid attempt to access a field before calling Read()]
– Mohammad Khaled
Nov 16 '18 at 10:17
@TetsuyaYamamoto I want it something like this which can take decision upon mount_serve column with compare rfid column (If (rd.Read()) Then rd.GetString("Amount_Serve") = small MessageBox.Show("OK") Else MessageBox.Show("Not your time") End If)
– Mohammad Khaled
Nov 16 '18 at 11:12
Note that what you are after is not a column at all, just a value in a database. Clear questions get more and better answers
– Make StackOverflow Good Again
Nov 16 '18 at 17:16
Something like
rd.GetString(5) or rd["Amount_Serve"].ToString() should be enough to retrieve the data and store it inside a string variable.– Tetsuya Yamamoto
Nov 16 '18 at 7:46
Something like
rd.GetString(5) or rd["Amount_Serve"].ToString() should be enough to retrieve the data and store it inside a string variable.– Tetsuya Yamamoto
Nov 16 '18 at 7:46
Thanks a lot for your reply to help but I want to be clear please..for this rd.GetString(5) I have to replace 5 with Amount_serve column name?
– Mohammad Khaled
Nov 16 '18 at 9:55
Thanks a lot for your reply to help but I want to be clear please..for this rd.GetString(5) I have to replace 5 with Amount_serve column name?
– Mohammad Khaled
Nov 16 '18 at 9:55
@Tetsuya I tried this: If [rd.GetString("Amount_Serve") = "small"] Then . I got this error [Additional information: Invalid attempt to access a field before calling Read()]
– Mohammad Khaled
Nov 16 '18 at 10:17
@Tetsuya I tried this: If [rd.GetString("Amount_Serve") = "small"] Then . I got this error [Additional information: Invalid attempt to access a field before calling Read()]
– Mohammad Khaled
Nov 16 '18 at 10:17
@TetsuyaYamamoto I want it something like this which can take decision upon mount_serve column with compare rfid column (
If (rd.Read()) Then rd.GetString("Amount_Serve") = small MessageBox.Show("OK") Else MessageBox.Show("Not your time") End If)– Mohammad Khaled
Nov 16 '18 at 11:12
@TetsuyaYamamoto I want it something like this which can take decision upon mount_serve column with compare rfid column (
If (rd.Read()) Then rd.GetString("Amount_Serve") = small MessageBox.Show("OK") Else MessageBox.Show("Not your time") End If)– Mohammad Khaled
Nov 16 '18 at 11:12
Note that what you are after is not a column at all, just a value in a database. Clear questions get more and better answers
– Make StackOverflow Good Again
Nov 16 '18 at 17:16
Note that what you are after is not a column at all, just a value in a database. Clear questions get more and better answers
– Make StackOverflow Good Again
Nov 16 '18 at 17:16
add a comment |
1 Answer
1
active
oldest
votes
0
First thanks for @TetsuyaYamamoto to give me the hint!
The solution was like this:
If rd.Read() Then
If rd.GetString(4) = "small" Then
MessageBox.Show("small")
ElseIf rd.GetString(3) = "Big" Then
MessageBox.Show("big")
End If
End If
Thanks for all
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53333457%2fhow-to-use-one-of-mysql-database-column-as-variable-with-vb-net%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
First thanks for @TetsuyaYamamoto to give me the hint!
The solution was like this:
If rd.Read() Then
If rd.GetString(4) = "small" Then
MessageBox.Show("small")
ElseIf rd.GetString(3) = "Big" Then
MessageBox.Show("big")
End If
End If
Thanks for all
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
add a comment |
0
First thanks for @TetsuyaYamamoto to give me the hint!
The solution was like this:
If rd.Read() Then
If rd.GetString(4) = "small" Then
MessageBox.Show("small")
ElseIf rd.GetString(3) = "Big" Then
MessageBox.Show("big")
End If
End If
Thanks for all
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
add a comment |
0
0
0
First thanks for @TetsuyaYamamoto to give me the hint!
The solution was like this:
If rd.Read() Then
If rd.GetString(4) = "small" Then
MessageBox.Show("small")
ElseIf rd.GetString(3) = "Big" Then
MessageBox.Show("big")
End If
End If
Thanks for all
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
First thanks for @TetsuyaYamamoto to give me the hint!
The solution was like this:
If rd.Read() Then
If rd.GetString(4) = "small" Then
MessageBox.Show("small")
ElseIf rd.GetString(3) = "Big" Then
MessageBox.Show("big")
End If
End If
Thanks for all
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
edited Nov 16 '18 at 13:37
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
answered Nov 16 '18 at 12:19
Mohammad KhaledMohammad Khaled
58
58
add a comment |
add a comment |
draft saved
draft discarded
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53333457%2fhow-to-use-one-of-mysql-database-column-as-variable-with-vb-net%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Something like
rd.GetString(5)orrd["Amount_Serve"].ToString()should be enough to retrieve the data and store it inside a string variable.– Tetsuya Yamamoto
Nov 16 '18 at 7:46
Thanks a lot for your reply to help but I want to be clear please..for this rd.GetString(5) I have to replace 5 with Amount_serve column name?
– Mohammad Khaled
Nov 16 '18 at 9:55
@Tetsuya I tried this: If [rd.GetString("Amount_Serve") = "small"] Then . I got this error [Additional information: Invalid attempt to access a field before calling Read()]
– Mohammad Khaled
Nov 16 '18 at 10:17
@TetsuyaYamamoto I want it something like this which can take decision upon mount_serve column with compare rfid column (
If (rd.Read()) Then rd.GetString("Amount_Serve") = small MessageBox.Show("OK") Else MessageBox.Show("Not your time") End If)– Mohammad Khaled
Nov 16 '18 at 11:12
Note that what you are after is not a column at all, just a value in a database. Clear questions get more and better answers
– Make StackOverflow Good Again
Nov 16 '18 at 17:16