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Hi all,
I am trying convert Gridview into Image. I am getting ArgumentException(Parameter is invalid) when i pass that memorystream object to Image.FromStream().
Please help me how to fix this error.
Here is my code
btn_GenImageOfGridview()
{
//Bind Gridview
gview.DataSource = mydatasource;
gview.DataBind();
//variable declaration
Response.Clear();
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new System.Web.UI.HtmlTextWriter(stringWrite);
gview.RenderControl(htmlWrite);
string s = stringWrite.ToString();
byte[] arrByte = new byte[s.ToCharArray().Length];
int i = 0;
foreach (char ch in s.ToCharArray())
{
arrByte[i] = (byte)ch;
i++;
}
System.IO.MemoryStream ms = new System.IO.MemoryStream(arrByte);
System.Drawing.Image returnImage = System.Drawing.Image.FromStream(ms, false,true); //Here i am Getting above Exception.returnImage.Save(@"D:\image.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
}
Please help me how to fix that error.
Thanks in advance.
Cheers,
sekhar
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 you're kidding right?? You're expecting the rendered HTML of a gridview to magically become an image just because you're loading that HTML into an image?
Sorry buddy, it ain't gonna happen!
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Is there any other way to achieve this.
I mean i have to capture gridview as Image.
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Print Screen.
That really is an awful question.
The answers posted by me are suggestions only and cannot be used in anyway against me.
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Thanks .netman.
My requirement is to convert only Gridview into Image. Not the Entire page or Screen, these are i already did it.
If you know any other way to do that, let me know.
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sekhar.k wrote: Is there any other way to achieve this.
No, there is not any built-in method for doing this. Certainly expeecting the HTML to render as an image is not going to work as stated.
About the only way I can think of doing this is to create a blank Bitmap, and draw a table using the GDI+ drawing methods. You could read the columns/rows from your gridview and replicate this on the bitmap.
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Hi,
i have problem in ie6 with the onfocus event.The onblur and onfocus event execute some javascript code. The problem is , in mozzilla this work ok, in ie6 work only for some objects.
Fe: for the companyname textbox the browser didnt apply this 2 events, the select object work fine.
Can u help me in this problem?
I add this event to my object fr5om code behind:
in page load :
..
Me.companyname.Attributes.Add("onFocus", "changehint('hint1',2)")
Me.companyname.Attributes.Add("onBlur", "check_field('companyname',this.value,'hint1')")
Me.state.Attributes.Add("onfocus", "changehint('hint4',2)")
Me.state.Attributes.Add("onblur", "check_field('state',this.value,'hint4')")
My aspx page looks like this
...
<table style="text-align:left;">
<tbody>
<tr class="row">
<td ><asp:Label ID="txtcompanyname" runat="server" Text="name + form"></asp:Label>*
<br /><asp:Label ID="obs_name" runat="server" Font-Size="9px"></asp:Label></td>
<td><asp:TextBox ID="companyname" runat="server" ></asp:TextBox>
</td>
<td>
<span id="hint1" class="hintForRegistration ">
<asp:RequiredFieldValidator CssClass="hinttext" ID="reqname" Display="Dynamic" runat="server" ControlToValidate="companyname" ErrorMessage="error1"></asp:RequiredFieldValidator>
<asp:label ID="Label0" runat="server" CssClass="hinttext"></asp:label></span>
</td>
</tr>
<tr class="row">
<td><asp:Label ID="txtcompanycounty" runat="server" Text="county"></asp:Label>*</td>
<td>
<select id="state" runat="server" >
<option selected="selected" value=""></option>
<option value="Baranya">Baranya</option>
</select></td>
<td>
<span id="hint4" class="hintForRegistration ">
<asp:label CssClass="hinttext" ID="Label3" runat="server"></asp:label>
</span>
</td>
</tr>
The javascript code change hintbox style on onfocus or onblur event:
function changehint(elem,type,label)
{
var hint = document.getElementById(elem);
hint.style.visibility = "visible";
if (type == 1)
{hint.className='hintForRegistration red';}
else if (type == 2)
{hint.className='hintForRegistration orange';}
else if (type == 3)
{hint.className='hintForRegistration blue';
hint.innertext = 'OKSA!';}
}
function check_field(thefield,thevalue,thehint)
{
if (thefield == "companyname" || thefield == "state" || thefield =="companystreet" || thefield =="companycity")
{if (validate_anytext(thevalue)) changehint(thehint,3)
else changehint(thehint,1)
}
else if (thefield == "companymail")
{if (validate_email(thevalue)) changehint(thehint,3)
else changehint(thehint,1)
}
else if (thefield == "companypass1" || thefield == "companypass2")
{if (validate_pass(thevalue)) changehint(thehint,3)
else changehint(thehint,1)
}
else changehint(thehint,3)
}
thanks
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If this is a direct copy of your code, your solution may be really simple: check casing when assigning the attributes to Me.CompanyName. You have "onFocus" in that control, but "onfocus" in the State control.
Have faith in yourself; amateurs built the Ark, professionals built the Titanic.
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i try it but not work.
The freaky thing is, when i make a save page as and i start the local copy in ie6, everything works fine. I must mention the page was saved in Ie6, so the generated code is the same.
In developer toolbar the textbox doesnt have the onfocus and onblur event.
thanks
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hi..i want to validate drop down list in asp content page..
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Good for you. Is there a specific problem? Have you perhaps looked at the section of the toolbox that contains the validator controls...?
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What a required field validator?
Be more specifc?
The answers posted by me are suggestions only and cannot be used in anyway against me.
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meghamaharshi wrote: hi..i want to validate drop down list in asp content page..
good, now did you have a question?
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I'm trying to make a data bound column invisible after data binding, because it won't exist before data binding. However, the DataGrid.Columns collection indicates a count of 0, making it seem as if the automatically generated columns don't belong to the collection.
How can I make a column that is automatically generated during binding invisible?
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on the basis of your condition
if(Condition)
gv.columns[no].visible=true;
else
gv.columns[no].visible=false;
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As I stated in my question, the columns collection is empty.
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Have you tried doing in the event handler for DataBound? I presume that the auto-generated columns are created when the control data binds.
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I'm currently doing it in the ItemCreate event, with success, thanks.
It was even after the DataBind call that the Columns collection was empty. I wonder if the call is asynchronous?
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i m using sql server2000 and ASP.net2005. i create report using reportviewer. and set its processing mode to [server].print option is visible in design time but not show in run time. please help me its very very urgent. my client is wait for it. he have to print the report immediate bases. if i export report in excel or pdf its format will disturb. but i want to print directly from reportviewer. please help it very very urgent. 
Amit Gautam
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How it can be possiable please help me
Anu Gaur
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Google, double-poster.
Blog link to be reinstated at a later date.
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Hi All,
I would like to take only Date part of DateTime variable?
Eg. 2008-09-18 12:00:01.000' i only needed 2008-09-18
Please advice
Thank you
Kibrom
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DatTime has a ToShortDateString() method. You can also access the Year ,Month & Day properties directly.
All this you could have found out yourself by reading the actual documentation for the class.
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Use the Date property of the DateTime structure.
Despite everything, the person most likely to be fooling you next is yourself.
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