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Unable to cast object of type System.String to type System.B

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Unable to cast object of type System.String to type System.B

Akhter HUssain

Akhter HUssain

7yAsked Sep 23, 2019, 6:30 AM1.3kLearn iOS Programming

I am passing data from one page to another page, but one image this exception is being raised that

Unable to cast object of type System.String to type System.Byte.

here is my second page html of image..

"Image">
<%--"img" runat="server" ImageUrl='<%# Eval("Data").ToString() %>' Height="100px" Width="100px" />--%>
"Data" runat="server" Width="100px" Height="80px" ImageUrl='<%# "data:image/jpg;base64," + Convert.ToBase64String((byte[])Eval("Data")) %>' />

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Rafnas T P7y ago
hi try below

byte[] bytes = Encoding.ASCII.GetBytes(someString);

ref:
https://www.c-sharpcorner.com/article/c-sharp-string-to-byte-array/
0
Akhter HUssain7y ago
Hi Salman Beg

i Found that cause
dr["Data"] = ds.Tables[0].Rows[0]["Data"].ToString();

but i do not know that how it will convert into binary
0
Salman Beg7y ago
Hi. The error is saying that you have string data which can't convert to the byte[]. because the image tag can understand only byte[] not string data.
+1