itextsharp edit existing pdf c#

itextsharp edit existing pdf c#

how to edit pdf file in asp net c#

pdf c# find ocr use, pdf footer how to text using, pdf free software user view, pdf best editor software windows 7, pdf display file how to js,

excel to pdf using itextsharp in c#, c# convert image to pdf, how to open pdf file in adobe reader using c#, convert pdf to excel using c# windows application, convert tiff to pdf c# itextsharp, c# free pdf viewer, convert pdf to png using c#, how to convert image into pdf in asp net c#, excel to pdf using itextsharp in c#, pdf to jpg c#, convert word to pdf in c# code, c# open pdf adobe reader, c# generate pdf with images, c# .net pdf reader, pdf viewer control without acrobat reader installed c#

how to read pdf file in asp.net c#, how to write pdf file in asp.net c#, asp.net pdf file free download, best asp.net pdf library, asp.net pdf viewer annotation, asp.net print pdf without preview, microsoft azure ocr pdf, azure web app pdf generation, asp.net mvc display pdf, how to write pdf file in asp.net c#

how to edit pdf file in asp net c#,
c# pdf editor,
pdf xchange editor c#,
how to edit pdf file in asp.net c#,
how to edit pdf file in asp net c#,
c# edit pdf,
pdf xchange editor c#,
how to edit pdf file in asp.net c#,
edit pdf c#,

Now that you understand better the role of the connection object, the next order of business is to check out how to submit SQL queries to the database in question. The SqlCommand type (which derives from DbCommand) is an OO representation of a SQL query, table name, or stored procedure. You specify the type of command using the CommandType property, which can take any value from the CommandType enum: public enum CommandType { StoredProcedure, TableDirect, Text // Default value. } When you create a command object, you can establish the SQL query as a constructor parameter or directly by using the CommandText property. Also when you create a command object, you need to specify the connection you want to use. Again, you can do so as a constructor parameter or by using the Connection property. Consider this code snippet: // Create command object via ctor args. string strSQL = "Select * From Inventory"; SqlCommand myCommand = new SqlCommand(strSQL, cn); // Create another command object via properties. SqlCommand testCommand = new SqlCommand(); testCommand.Connection = cn; testCommand.CommandText = strSQL; Realize that at this point that you have not literally submitted the SQL query to the AutoLot database, but instead prepared the state of the command object for future use. Table 21-6 highlights some additional members of the DbCommand type. Table 21-6. Members of the DbCommand Type

What you cannot see in Figure 20-2 are validation controls. Validation controls are especially important to let the user enter only valid values for a user name and a password. Remember what we mentioned in the previous chapter: Never trust user input. Validation adheres to this principle by ensuring that only valid values are entered. Here you can see all the controls contained on the login page: <form id="form1" runat="server"> <div style="text-align: center"> Please Log into the System<br /> <asp:Panel ID="MainPanel" runat="server" Height="90px" Width="380px" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px"> <br /> <table width="100%" border="0" cellpadding="0" cellspacing="0"> <tr> <td width="30%" style="height: 43px"> User Name:</td> <td width="70%" style="height: 43px"> <asp:TextBox ID="UsernameText" runat="server" Width="80%" /> <asp:RequiredFieldValidator ID="UsernameRequiredValidator" runat="server" ErrorMessage="*" ControlToValidate="UsernameText" /> <br /> <asp:RegularExpressionValidator ID="UsernameValidator" runat="server" ControlToValidate="UsernameText" ErrorMessage="Invalid username" ValidationExpression="[\w| ]*" /> </td> </tr> <tr> <td width="30%" style="height: 26px"> Password:</td> <td width="70%" style="height: 26px"> <asp:TextBox ID="PasswordText" runat="server" Width="80%" TextMode="Password" /> <asp:RequiredFieldValidator ID="PwdRequiredValidator" runat="server" ErrorMessage="*" ControlToValidate="PasswordText" /> <br /> <asp:RegularExpressionValidator ID="PwdValidator" runat="server" ControlToValidate="PasswordText" ErrorMessage="Invalid password" ValidationExpression='[\w| !" $%&/()=\- \*]*' /> </td> </tr> </table> <br /> <asp:Button ID="LoginAction" runat="server" OnClick="LoginAction_Click" Text="Login" /><br /> <asp:Label ID="LegendStatus" runat="server" EnableViewState="False" Text="" /> </asp:Panel> </div> </form> As mentioned previously, the validation controls serve two purposes. First, the RequiredFieldValidator controls ensure that both a user name and password are entered in a valid

convert pdf to word programmatically in c#, java ean 13 reader, c# code to save excel file as pdf, c# ghostscript.net pdf to image, convert pdf to excel using itextsharp in c#, convert excel to pdf c# itextsharp

Gets or sets the time to wait while executing the command before terminating the attempt and generating an error. The default is 30 seconds. Gets or sets the DbConnection used by this instance of the DbCommand. Gets the collection of DbParameter objects used for a parameterized query. Cancels the execution of a command. Executes a SQL query and returns the data provider s DbDataReader object, which provides forward-only, read-only access for the result of the query.

format containing only the characters allowed for user names and passwords. Second, the RegularExpressionValdiator controls ensure that only valid values are entered in the User Name text field and in the Password text field. For example, the user name may contain letters, digits, and spaces only. Therefore, the validation expression looks like this: ValidationExpression="[\w| ]*" The \w character class is equivalent to [a-zA-Z_0-9], and the space afterward allows spaces in the user name. The password, for example, may also contain special characters. Therefore, the validation expression looks different from the previous one, as shown here: ValidationExpression='[\w| !" $%&/()=\- \*]*' Note that the single quote is used for enclosing the attribute value, because this uses the double quote as the allowed special character. Furthermore, because the attribute is contained in the tag code (and therefore the HTML entity), & indicates that the ampersand (&) character is allowed in the password. You can see the validation controls in action in Figure 20-3.

Connection Parameters Cancel() ExecuteReader()

Sometimes it is useful to inject directly into a collection of other beans or values. Spring supports the injection of Properties, Map, Set, and List. In this section, we ll show some examples of how to inject a List, a Map, and a Set of messages in the class hellofilippo.

As you can see in Figure 20-3, with validation controls in place you can stop users from entering values for the user name or password that would lead to a SQL injection attack. In addition to using parameterized SQL queries (introduced in 7), you should always use validation controls to mitigate this type of attack in your applications. The last step for creating the login page is to write the code for validating the credentials against the values entered by the user. You have to add the necessary code to the Click event of the login button. Because the following Click event is using the credentials store of the web.config file, validation is fairly easy: Protected Sub LoginAction_Click(ByVal sender As Object, ByVal e As EventArgs) Page.Validate() If (Not Page.IsValid) Then Return End If

Table 21-6. Members of the DbCommand Type (continued)

uwp generate barcode, birt pdf 417, asp.net core barcode scanner, uwp generate barcode