Boolean Data Type Not Available (workaround For Checkbox.checked Storing?)
Sep 2, 2006
I have a page for inventory price entry that I have used for a while. Now I need to add a checkbox for whether or not the price includes shipping. I added the checkbox to the form and had it posting 'True' or 'False' to the database as nchar(10) data type. When the gridview pulls up the data, I have the Item Template like this, so it shows a disabled checkbox either checked or not:
<asp:CheckBox ID="CheckBox2" runat="server" Checked='<%# Convert.ToBoolean(Eval("Shipping")) %>' Enabled="False" />
This works fine for displaying the values, but I copied the checkbox to the Edit Item Template, but did not disabled this one. At first, I didn't change the databindings, leaving it Convert.ToBoolean(Eval("Shipping")), which allowed me to go into Edit mode, change the checkbox, then click update. At which point it would return to it's original state (meaning Update wasn't actually updating). However if I change the databindings, then the page won't display.
I checked the SQL statement, and sure enough, it has the
UpdateCommand="UPDATE [PartsTable] ... SET [Shipping] = @Shipping... WHERE [PartID] = @original_PartID
After fiddling with the sql statement, now I get Object cannot be cast from DBNull to other types. I think that means that the checkbox is sending a null value to the database.
Any insight as to how to get this to work is much appreciated. Thanks in advance.
Is their a data type that can be a 'check' (On or Off)? I seen this data type somewhere but forgor how to use it and what it looks like. Can anyone help. :)
Hi, I need to return the system date to a column when a checkbox in another column becomes true, e.g. the instant a user updates a table where checkbox.value = 'true' it will record the date that it happened in another column.
Obviously, I'm new to SQL Server, because I'm still scratching my head wondering where in the world the boolean data type is. Can anyone please explain to me how boolean data types REALLY work in SQL Server? I've created a few Bit type fields, but when using a datagrid, they sometimes show up as 0 and 1 and sometimes as True/False, and I can't see a difference in how the grids (or fields(!)) are set up that would explain this. Any insight would be greatly appreciated!
What data type should I use as a replacement of Boolean in SQL server? I need to create a table column with a "two-state" data type and must ensure, that only one record can hold value "True" in this column... Any ideas? Thanks
I know this is a stupid question, but I've searched and can't seem to find it.
What do you use in SQL when creating a table and the field is a "yes/no" type field? In VB isn't that a boolean data type? What is the corresponding SQL data type?
Hi i am trying to store the checkbox values on my page to the database, but im stuck on what to do. I have the following code already;protected void Btn_Subscribe_Click(object sender, EventArgs e) {SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["streamConnectionString"].ConnectionString); string strSQL = "INSERT INTO Newsletter(emailAddress) VALUES (@emailAddress)";SqlCommand Command = new SqlCommand(strSQL, conn); Command.Parameters.Add("@emailAddress", SqlDbType.VarChar);Command.Parameters["@emailAddress"].Value = txtEmail.Text; conn.Open(); Command.ExecuteNonQuery(); conn.Close(); } How do i now insert the values from my checkbox, this is how i am setting the checkbox;public void Page_Load(object sender, EventArgs e) {ArrayList values;if(!IsPostBack) { //Build array of data to bind to checkboxlistvalues = new ArrayList(); values.Add("Sport");values.Add("Gardening");values.Add("technology"); AlertList.DataSource = values; AlertList.DataBind(); } If i am going about it the wrong way please let me know, thanks
This is nutty. I never got this error on my local machine. The only lower case m in the sql is by near the variable Ratingsum like in line 59. [SqlException (0x80131904): Incorrect syntax near 'm'.An expression of non-boolean type specified in a context where a condition is expected, near 'type'.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +925466 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +800118 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +186 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1932 System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) +196 System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +269 System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +135 view_full_article.btnRating_Click(Object Src, EventArgs E) +565 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107 System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746</pre></code> Here is my button click sub in its entirety: 1 Sub btnRating_Click(ByVal Src As Object, ByVal E As EventArgs) 2 'Variable declarations... 3 Dim articleid As Integer 4 articleid = Request.QueryString("aid") 5 Dim strSelectQuery, strInsertQuery As String 6 Dim strCon As String 7 Dim conMyConnection As New System.Data.SqlClient.SqlConnection() 8 Dim cmdMyCommand As New System.Data.SqlClient.SqlCommand() 9 Dim dtrMyDataReader As System.Data.SqlClient.SqlDataReader 10 Dim MyHttpAppObject As System.Web.HttpContext = _ 11 System.Web.HttpContext.Current 12 Dim strRemoteAddress As String 13 Dim intSelectedRating, intCount As Integer 14 Dim Ratingvalues As Decimal 15 Dim Ratingnums As Decimal 16 Dim Stars As Decimal 17 Dim Comments As String 18 Dim active As Boolean = False 19 Me.lblRating.Text = "" 20 'Get the user's ip address and cast its type to string... 21 strRemoteAddress = CStr(MyHttpAppObject.Request.UserHostAddress) 22 'Build the query string. This time check to see if IP address has already rated this ID. 23 strSelectQuery = "SELECT COUNT(*) As RatingCount " 24 strSelectQuery += "FROM tblArticleRating WHERE Itemid=" & articleid 25 strSelectQuery += " AND ip = '" & strRemoteAddress & "'" 26 'Open the connection, and execute the query... 27 strCon = System.Web.Configuration.WebConfigurationManager.ConnectionStrings("sqlConnectionString").ConnectionString 28 conMyConnection.ConnectionString = strCon 29 conMyConnection.Open() 30 cmdMyCommand.Connection = conMyConnection 31 cmdMyCommand.CommandType = System.Data.CommandType.Text 32 cmdMyCommand.CommandText = strSelectQuery 33 intCount = cmdMyCommand.ExecuteScalar() 34 intSelectedRating = Int(Me.rbRating.Text) 35 conMyConnection.Close() 36 'Close the connection to release these resources... 37 38 If intCount = 0 Then 'The user hasn't rated the article 39 'before, so perform the insert... 40 strInsertQuery = "INSERT INTO tblArticleRating (rating, ip, itemID, comment, active) " 41 strInsertQuery += "VALUES (" 42 strInsertQuery += intSelectedRating & ", '" 43 strInsertQuery += strRemoteAddress & "', " 44 strInsertQuery += articleid & ", '" 45 strInsertQuery += comment.Text & "', '" 46 strInsertQuery += active & "'); " 47 cmdMyCommand.CommandText = strInsertQuery 48 conMyConnection.Open() 49 cmdMyCommand.ExecuteNonQuery() 50 conMyConnection.Close() 51 Me.lblRating.Text = "Thanks for your vote!" 52 Comments = comment.Text.ToString 53 54 If Len(Comments) > 0 Then 55 emailadmin(comment.Text, articleid) 56 End If 57 'now update the article db for the two values but first get the correct ratings for the article 58 strSelectQuery = _ 59 "SELECT SUM(rating) As RatingSum, COUNT(*) As RatingCount " 60 strSelectQuery += "FROM tblArticleRating WHERE Itemid=" & articleid 61 conMyConnection.Open() 62 cmdMyCommand.CommandText = strSelectQuery 63 dtrMyDataReader = cmdMyCommand.ExecuteReader() 64 dtrMyDataReader.Read() 65 Ratingvalues = Convert.ToDecimal(dtrMyDataReader("RatingSum").ToString) 66 Ratingnums = Convert.ToDecimal(dtrMyDataReader("RatingCount").ToString) 67 Stars = Ratingvalues / Ratingnums 68 conMyConnection.Close() 69 'Response.Write("Values: " & Ratingvalues) 70 'Response.Write("Votes: " & Ratingnums) 71 72 UpdateRating(articleid, Stars, Ratingnums) 73 Else 'The user has rated the article before, so display a message... 74 Me.lblRating.Text = "You've already rated this article" 75 End If 76 strSelectQuery = _ 77 "SELECT SUM(rating) As RatingSum, COUNT(*) As RatingCount " 78 strSelectQuery += "FROM tblArticleRating WHERE Itemid=" & articleid 79 conMyConnection.Open() 80 cmdMyCommand.CommandText = strSelectQuery 81 dtrMyDataReader = cmdMyCommand.ExecuteReader() 82 dtrMyDataReader.Read() 83 Ratingvalues = Convert.ToDecimal(dtrMyDataReader("RatingSum").ToString) 84 Ratingnums = Convert.ToDecimal(dtrMyDataReader("RatingCount").ToString) 85 Stars = Ratingvalues / Ratingnums 86 If (Ratingnums = 1) And (Stars <= 1) Then 87 lblRatingCount.Text =" (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Vote" 88 ElseIf (Ratingnums = 1) And (Stars > 1) Then 89 lblRatingCount.Text = " (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Vote" 90 ElseIf (Ratingnums > 1) And (Stars <= 1) Then 91 lblRatingCount.Text =" (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Votes" 92 ElseIf (Ratingnums > 1) And (Stars > 1) Then 93 lblRatingCount.Text = " (" & (String.Format("{0:f2}", Stars)) & ") / " & dtrMyDataReader("RatingCount") & " Votes" 94 End If 95 96 'Response.Write(String.Format("{0:f2}", Stars)) 97 'Response.Write("Values: " & Ratingvalues) 98 'Response.Write("Votes: " & Ratingnums) 99 If (Stars > 0) And (Stars <= 0.5) Then 100 Me.Rating.ImageUrl ="./images/rating/05star.gif" 101 ElseIf (Stars > 0.5) And (Stars < 1.0) Then 102 Me.Rating.ImageUrl = "./images/rating/05star.gif" 103 ElseIf (Stars >= 1.0) And (Stars < 1.5) Then 104 Me.Rating.ImageUrl = "./images/rating/1star.gif" 105 ElseIf (Stars >= 1.5) And (Stars < 2.0) Then 106 Me.Rating.ImageUrl = "./images/rating/15star.gif" 107 ElseIf (Stars >= 2.0) And (Stars < 2.5) Then 108 Me.Rating.ImageUrl = "./images/rating/2star.gif" 109 ElseIf (Stars >= 2.5) And (Stars < 3.0) Then 110 Me.Rating.ImageUrl = "./images/rating/25star.gif" 111 ElseIf (Stars >= 3.0) And (Stars < 3.5) Then 112 Me.Rating.ImageUrl = "./images/rating/3star.gif" 113 ElseIf (Stars >= 3.5) And (Stars < 4.0) Then 114 Me.Rating.ImageUrl = "./images/rating/35star.gif" 115 ElseIf (Stars >= 4.0) And (Stars < 4.5) Then 116 Me.Rating.ImageUrl = "./images/rating/4star.gif" 117 ElseIf (Stars >= 4.5) And (Stars < 5.0) Then 118 Me.Rating.ImageUrl = "./images/rating/45star.gif" 119 ElseIf (Stars >= 4.5) And (Stars <= 5.0) Then 120 Me.Rating.ImageUrl = "./images/rating/5star.gif" 121 End If 122 dtrMyDataReader.Close() 123 conMyConnection.Close() 124 End Sub
If you want to reduplicate the error, click over here and try to submit a rating: http://www.link-exchangers.com/view_full_article.aspx?aid=51 Thanks for helping me figure this out.
Just starting to investigate this. I need to store digital pictures in my database for use in claims and disputes. I have played a bit with the image datatype but notice that one picture takes up 1Mb as a TIFF and 3Mb as a JPEG. Does anybody work with this stuff and if you do what is the best picture format to use in regards to keeping clarity but minimizing size used in the db. Is there any load conversion routines that would shrink the size of the file.
Any suggestions or comments on this topic are appreciated.
Just starting to investigate this. I need to store digital pictures in my database for use in claims and disputes. I have played a bit with the image datatype but notice that one picture takes up 1Mb as a TIFF and 3Mb as a JPEG. Does anybody work with this stuff and if you do what is the best picture format to use in regards to keeping clarity but minimizing size used in the db. Is there any load conversion routines that would shrink the size of the file.
Any suggestions or comments on this topic are appreciated.
Let's say a user profile page on a website contains a description about a car that the user wants to sell. The user could try to be wise and write something very short like "buy my car" or the user could write a very lengthy description of his car to convince the buyer to make the purchase. Or somebody creates a thread in a forum or replies to a topic (much like what we do here). In these instances, what is the most efficient manner of storing the high-character content in these examples with SQL Server 2005? Keep in mind that a user could make a 2-character post like "OK" or could write a long reply or create a huge profile. So the data type has to be efficient and flexible. Judging from the list of available types in my Express 2005, I would guess the varchar(MAX) or the text data types could be used. Or would I use some other data type? TIA.
This could well be down to my _limited_ knowledge of XSD.
I have a document and SXD supplied by 3rd party.
Both documents are valid, according to XMLSpy.
When I give the document and xsd to SSIS XML Source it complains about ambiguous complex types.
In the XML doc there is an element called Allowance that has child elements.
There is also a group which references many other elements including Allowance.
When I remove the group, SSIS stops complaining about allowance.
Would the problem stem from SSIS creating an output called Allowance ('cause of it's children), getting to the group and again, 'cause allowance has children, try create another output called Allowance.
Is my understanding of this correct? Is there a work around for a situation like this?
The only thing I can come up with is deleting the group....
Possible to alias an element? Could alias the Group > Allowance g_Allowance.
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SELECT MG_BL_ITINERARY.ETA_DT, MG_BL_ITINERARY.TO_LOCATION_CD FROM MG_BL_ITINERARY
[code]...
what I need to change in the WHERE clause to rectify this error ?
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4. How can you say that SQL server does support images well, because on microsoft site they loaded up the satellite data of the earth into sqlserver which is only picture data
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