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POhow to do postback Javascript, jquery
 

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    <pre><code>&lt;asp:Button ID="btn" OnClientClick="if(confirm_delete()){ /* post back*/ }else{ return false; };" OnClick="btnDelete_Click" runat="server" Text="delete"/&gt; </code></pre> <p>Hi I have this code but I cant do postback for it, im not sure how to?</p> <p>is it:</p> <pre><code>&lt;script type="text/javascript"&gt; function CallServer() { __doPostBack('not sure what goes here','or here'); } &lt;/script&gt; </code></pre> <p>Then:</p> <pre><code>&lt;asp:Button ID="btn" OnClientClick="if(confirm_delete()){ /CallServer()/ }else{ return false; };" OnClick="btnDelete_Click" runat="server" Text="delete"/&gt; </code></pre> <p>My other script:</p> <pre><code>&lt;script type="text/javascript"&gt; function confirm_delete() { if (confirm("Are you sure you want to delete this comment?")==true) return true; else return false; } &lt;/script&gt; </code></pre> <p><strong>EDIT:</strong></p> <p>On the server side i dynamically add a div to my page with content from my database for each content there is a new div will be added, each div is then refrenced with idWallPosting (so i can call my delete function)</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.Odbc; using System.IO; public partial class UserProfileWall : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //btn.Visible = false; string theUserId = Session["UserID"].ToString(); PopulateWallPosts(theUserId); } private void PopulateWallPosts(string userId) { using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;")) { cn.Open(); using (OdbcCommand cmd = new OdbcCommand("SELECT idWallPosting, wp.WallPostings, p.PicturePath FROM WallPosting wp LEFT JOIN User u ON u.UserID = wp.UserID LEFT JOIN Pictures p ON p.UserID = u.UserID WHERE wp.UserID=" + userId + " ORDER BY idWallPosting DESC", cn)) { //("SELECT wp.WallPostings, p.PicturePath FROM WallPosting wp LEFT JOIN [User] u ON u.UserID = wp.UserID LEFT JOIN Pictures p ON p.UserID = u.UserID WHERE UserID=" + userId + " ORDER BY idWallPosting DESC", cn)) using (OdbcDataReader reader = cmd.ExecuteReader()) { test1.Controls.Clear(); while (reader.Read()) { System.Web.UI.HtmlControls.HtmlGenericControl div = new System.Web.UI.HtmlControls.HtmlGenericControl("div"); div.Attributes["class"] = "test"; div.ID = String.Format("{0}", reader.GetString(0)); // this line is responsible, problem here and my sqlsntax, im trying to set the SELECT idWallPosting for the div ID Image img = new Image(); img.ImageUrl = String.Format("{0}", reader.GetString(2)); img.AlternateText = "Test image"; div.Controls.Add(img); div.Controls.Add(ParseControl(String.Format("&amp;nbsp&amp;nbsp&amp;nbsp;" + "{0}", reader.GetString(1)))); div.Attributes.Add("onclick", "return confirm_delete();"); div.Style["clear"] = "both"; test1.Controls.Add(div); } } } } } //protected void btnDelete_Click(object sender, EventArgs e) //{ // string id = "ctl00_ContentPlaceHolder1_ContentPlaceHolder2_26"; // string[] idFragments = id.Split('_'); // id = idFragments[idFragments.Length - 1]; // //serverside code if confirm was pressed. // using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;")) // { // cn.Open(); // using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting = " + id + ")", cn)) // { // cmd.ExecuteNonQuery(); // } // } // //PopulateWallPosts(); //} protected void Button1_Click(object sender, EventArgs e) { string theUserId = Session["UserID"].ToString(); using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;")) { cn.Open(); using (OdbcCommand cmd = new OdbcCommand("INSERT INTO WallPosting (UserID, Wallpostings) VALUES (" + theUserId + ", '" + TextBox1.Text + "')", cn)) { cmd.ExecuteNonQuery(); } } PopulateWallPosts(theUserId); } protected void btn_Click(object sender, EventArgs e) { string id = "ctl00_ContentPlaceHolder1_ContentPlaceHolder2_26"; string[] idFragments = id.Split('_'); id = idFragments[idFragments.Length - 1]; //serverside code if confirm was pressed. using (OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=root; Password=commando;")) { cn.Open(); using (OdbcCommand cmd = new OdbcCommand("DELETE FROM WallPosting WHERE idWallPosting = " + id + ")", cn)) { cmd.ExecuteNonQuery(); } } //PopulateWallPosts(); } } </code></pre> <p>On my asp.net html side i have:</p> <pre><code>&lt;script type="text/javascript"&gt; function confirm_delete() { if (confirm("Are you sure you want to delete this comment?")==true) return true; else return false; } &lt;/script&gt; &lt;p&gt; &lt;asp:Button ID="btn" OnClientClick="return confirm_delete();" runat="server" CssClass="Btn" Text="delete" onclick="btn_Click"/&gt; &lt;asp:TextBox ID="TextBox1" name="TextBox1" runat="server" Rows="3" Height="47px" Width="638px"&gt;&lt;/asp:TextBox&gt; &lt;/p&gt; &lt;p&gt; &lt;asp:Button ID="Button1" runat="server" Text="Post Message" Width="98px" onclick="Button1_Click" /&gt; &lt;/p&gt; &lt;p&gt; &lt;/p&gt; &lt;style type="text/css"&gt; img {border-width:0px; width:100px; height:100px;} &lt;/style&gt; &lt;div id="test1" runat="server" /&gt; &lt;/div&gt; &lt;/asp:Content&gt; </code></pre> <p>If you notice in my server side code I added this line:</p> <pre><code>div.Attributes.Add("onclick", "return confirm_delete();") </code></pre> <p>This works any time I click on my div the <code>confirm_delete</code> is called.</p> <p>What I was trying to do with my asp.net button was when the div was clicked I could then call the <code>onclick btnDelete_click</code>. </p>
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      1. VTUpMod
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    1. COThe code `if (xyz == true) { return true; } else { return false; }` seems a little redundant. Wouldn't `return xyz;` be cleaner and less error-prone?
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    2. COGarrith: show us the complete aspx context. Are you using UpdatePanels? Does it work if you simply write `OnClientClick="javascript: return confirm("Are you sure you want to delete this comment?");"`?
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    3. COupdated hope ive explain'd it better
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      1. USGarrith Graham
 

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