Alert Message from CodeBehind

1. How to Redirect a page after clicking OK of javascript alert box.

Way 1:

C# code behind:

string strScript = "<script>";
strScript += "alert('Type your message here');";
strScript += "window.location='TestPage.aspx';";
strScript += "</script>";
this.ClientScript.RegisterStartupScript(this.GetType(), "Startup", strScript);

Way 2:

 Response.Write("<script>alert('Successfully changed')</script>");

 Response.Write("<script>window.location.href='Default.aspx';</script>");

Way 3:

ScriptManager.RegisterStartupScript(page, page.GetType(), "err_msg", "alert('" + error + "'); window.location='newpage.aspx';", true); 2. Alert message from Codebehind: Way 1:    ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "alert('Success');", true); Way 2:   Page.ClientScript.RegisterStartupScript(this.GetType(), "key", "alert('No Records Available');", true); Way 3: If we have used Update Panel, Use following code.  ScriptManager.RegisterStartupScript(this.Page, typeof(UpdatePanel), "key", "alert('Success');", true); 2. Confirmation Message: <script type="text/javascript">         function Confirm(id, des) {             // debugger;             try {                 if (document.getElementById(id).value != "") {                     var r = confirm("This is new Code.Do you want add this code?");                     if (r == true) {                         document.getElementById(des).value = "";                         document.getElementById(des).focus();                         return true;                     }                     else {                         document.getElementById(id).value = "";                         document.getElementById(id).focus();                         return true;                     }                     return false;                 }             }             catch (e) {             }         }           </script>

Java Script Function

1. how to display block or none for control in javascript

<tr id="trBrowse" runat="server" style="display: none;">
      <td></td>
</tr>

trBrowse.Style.Add("display", "block");

How to get open folders list using C#?

To Open a particular folder in Explorer, just:

System.Diagnostics.Process.Start(@"explorer.exe", @"C:\Windows");

In fact, as Explorer is the asscoaited handler for folder, that could be written as:

System.Diagnostics.Process.Start(@"C:\Windows");

or

 string path="D:\\Test";

 System.Diagnostics.Process.Start("explorer.exe", path);

CheckForDuplicates confirmation message

protected void SaveButton_Click(object sender, EventArgs e)
{
    try
    {
        if (CheckForDuplicates())
        {
            //proceed normally
        }
    }
}

private bool CheckForDuplicates()
{
    //check database

            if (/*there are duplicates*/)
            {
                string message = "A duplicate name exists. Would you like to continue?";
                string scriptString = "<script language='javascript' 
                    type='text/javascript'>" + "return confirm('" + message + "');</script>";

                ScriptManager.RegisterStartupScript(this, this.GetType(), 
                    "script", scriptString, false);

                //here i would like to return their confirmation
            }
        }
    }
    return true;
}

Find Extented Ascii Value using javascript

<script type="text/javascript">
function CheckAll() {
var Titleid = document.getElementById('ID');
            var tit = Titleid.value;
            var T = [];
            for (var i = 0, j = Titleid.value.length; j--; i++) {
                T[i] = tit.charCodeAt(i);
                if (T[i] > 128) {
                    alert("Ascii found: " + String.fromCharCode(T[i]));
                    document.getElementById('ID').focus();
                    return false;
                }
            }

  return true;
        }
 </script>

Web Config Helps

1. Connection String:

<connectionStrings>
    <add name="constr"  connectionString="Initial catalog=DB_Name;uid=sa;pwd=Password;Data Source=Server_IP" providerName="System.Data.SqlClient"/>
  </connectionStrings>

2.  Error - Operation is not valid due to the current state of the object

Whenever a postback is done, this error occurs when form fields are very large (text) in number. The stack trace is:

at System.Web.HttpValueCollection.ThrowIfMaxHttpCollectionKeysExceeded() at System.Web.HttpValueCollection.FillFromEncodedBytes(Byte[] bytes, Encoding encoding) at System.Web.HttpRequest.FillInFormCollection()

By default, the maximum value of MaxHttpCollection is 1000.

To solve this error, increase the MaxHttpCollection value. Try adding the following setting in yourweb.config's <appsettings> block.

  <configuration>

      <appSettings>

    <add key="aspnet:MaxHttpCollectionKeys" value="9999" />

  </appSettings>

</configuration>

It can solve your problem. If you have very large records on your page, say 600 records in a grid, and you click on Submit, then increase the value of MaxHttpCollection.

2. EnCrypt and Decrypt of Connection String in webconfig:

Encrypt connectionStrings in web.config of IIS based site

 

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aspnet_regiis.exe -pe "connectionStrings" -app "/SampleWebSite"

Here –pe indicates that the application is built as IIS based site. Second argument connectionStrings is the name ofconfiguration section needs to be encrypted. The Third argument -app indicates virtual directory and last argument is the name of virtual directory where application is deployed.
 
Decrypt connectionStrings in web.config of IIS based site
 

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aspnet_regiis.exe -pd "connectionStrings" -app "/SampleWebSite"

Till now we learned how to encrypt and decrypt connectionStrings section in web.config file using aspnet_regiis.exe command line tool now I will explain code behind method to encrypt and decrypt the connection string section inweb.config.

3. How to: Set the Culture and UI Culture for ASP.NET Web Page Globalization

Or

CurrentCulture incorrectly defaulting to en-US in ASP.net

<globalization uiCulture="en" culture="en-US" />

4. How to increase Session Timeout:

<httpRuntime executionTimeout="999999" maxRequestLength="2097151"/>

5. How to Set: Dundas chart Temporary location, Default Excel version , Date and Time in Web config.

<appSettings>

    <add key="CommandTimeout" value="60000"/>

    <add key="DefaultDate" value="12/30/1899"/>

    <add key="DefaultTime" value="12/30/1899"/>

    <add key="OLEDBConnection2" value="Microsoft.Jet.OLEDB.4.0"/>

    <add key="OLEDBConnection" value="Microsoft.ACE.OLEDB.12.0"/>

    <add key="ExcelVersion" value="Excel 12.0"/>

    <add key="ChartHttpHandler" value="Storage=memory;Timeout=180;Url=~/temp/;"/>

</appSettings>