how to write conditon for searching on the base of Checklistbox

Question

4.14/5 (4 votes)

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inside of a db table's column different names of categories
e.g.,
Category
HP
Lenova
DELL
APPLE

now on a web form i have placed a check boxes list for multiple category names. Search is base on different categories(above mentioned) i am using

C#

if else

but the problem is how to write the conditions or Condtion for multiple search ??
i am doing like this

C#

if(Checkboxeslist.selectedIndex==0)//for hp
{
sql query
}
if(Checkboxeslist.selectedIndex==1)//for Dell
{
sql query
}
if(Checkboxeslist.selectedIndex==1 && Checkboxeslist.selectedIndex==0)//for Dell
{
sql query
}

and so on...conditions will never end i mean too much conditions.
please help me how to resolve this dilemma

Posted 31-Jul-13 19:52pm

Muhamad Faizan Khan

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Comments

Dholakiya Ankit 1-Aug-13 2:44am

oh ! very confused solution 1 is ok for you

3 solutions

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Syed Shabeer · Answer 1 · 2013-07-31T20:30:00

Why dont you try this

Loop through the selected item and form a dynamic query and finally execute it to get your desired output.

C#

string SQLQuery = "select blah, blah from Category where 1=1"
foreach (var item in checkedListBox1.CheckedItems)
{
	SQLQuery = SQLQuery + " or CategoryName= " + item                
}

//Execute your query

Hope it helps

Harshil_Raval · Answer 2 · 2013-07-31T21:25:00

Hi,

First of all get list of all selected checkbox values.

C#

string CategoryName = string.Empty;
string query = "select * from Category";
foreach(ListItem item in checkedListBox1.Items)
{
    if(item.Selected)
    {
        CategoryName += item.Text + ",";
    }
}
if (!string.IsNullOrEmpty(CategoryName))
{
    //remove last ,
    CategoryName = CategoryName.Remove(CategoryName.Length - 1, 1);

    // now complete your query
    query += "where CategoryName in (" + CategoryName + ")";

    // now you sqlexecute code
}

Mukesh Ghosh · Answer 3 · 2013-07-31T20:34:00

Solution 2

You can try in SQL query like

SQL

Select * from Category where PK_CATID is not null (Which is always true)

Now concatenate with this Checkboxeslist.selectedValue

sql="Select * from Category where PK_CATID is not null"
sql=sql+ and CategoryName='+Checkboxeslist.selectedValue

Posted 31-Jul-13 20:34pm

Mukesh Ghosh

Updated 31-Jul-13 21:01pm

v3

Comments

Adarsh chauhan 1-Aug-13 2:45am

I think it should be
sql="Select * from Category where PK_CATID is not null"
sql=sql+ 'and CategoryName='+Checkboxeslist.selectedValue

how to write conditon for searching on the base of Checklistbox

3 solutions

Solution 1

Solution 3

Solution 2

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